I prefer "I" to "we" because the focus is on Marle's return home.

Clearing the game at this point leads to the alternate ending "The Successor of Guardia".

Let's make a quick stop here. Also note that on the A.D. 1000 world map, "Tranquil Days" always plays within (most) town boundaries, and 1-5 みどりの思い (Memories of Greenery) always plays in the areas beyond the towns, making it the only world map with different music for different regions.

Lucca: Hmmm...
The miniaturization of robots that
balance properly walking on two
legs is difficult indeed.
Ah! Crono! Hurry up and take
the princess to the castle.

Lucca: Hmmm, two-legged, walking
humanoid robots are virtually
impossible to create.
Oh! Crono! Hurry up and escort
the Princess to the castle!

Okay then.

Though 400 years have passed, the castle looks nearly identical. Even the background music is the same.

The alternate ending "The Successor of Guardia" is no longer available after this, since the shortcut to the final boss won't be accessible for a while.

A man runs up to Marle from the direction of the throne room. He looks much like the A.D. 600 chancellor.

Chancellor: You are unharmed?
Where on earth have you BEEN!?
Reports said you were kidnapped, and we've
had soldiers searching the entire kingdom!

CHANCELLOR: Are you all right?
　Where have you been?!
　I heard you were abducted!
　We had soldiers searching for you!

Chancellor: Hey! You, the wretched scum!
That's it, it was you, wasn't it!?
You kidnapped lady Marledia!

CHANCELLOR: Scoundrel!
You're the one, huh?
Kidnapping Princess Nadia!

musai, as 無才, means witless and talentless, but here it's more likely a relatively obscure adjective roughly equating to "squalid" or "wretched".

Chancellor: Aiiee! Arrest him!
Damned terrorist, misleading
lady Marledia and plotting to
overthrow the royal family!!

A swarm of soldiers starts to converge on Crono.

The soldiers all suddenly stop to grovel. I think it's pretty funny.

The soldiers swarm Crono, and the music stops.

The internal storyline progression tracking variable is now 0x2A.

The courtroom is artfully constructed, but very imposing. 1-21 王国裁判 (Kingdom Trial), a solemn and not at all reassuring track, plays.

This scene has an enormous number of variations that depend both on what Crono did and didn't do at the fair earlier and on how he responds to questioning. I consider this to be a great scene, incidentally, since all those little, apparently meaningless things you did or didn't do back at the beginning of the game come back and really matter. For once, they actually care about your seemingly trivial actions and choices! There's a catch, though...

Chancellor: Welcome, everyone.
Let us bring in the man called Crono,
who is suspected in the crime of
kidnapping Princess Marledia.

CHANCELLOR: Members of the court.
We now bring forth the defendant,
Crono, who is charged with
abducting Princess Nadia.

The chancellor walks to the doorway and leads Crono to the center of the room.

Chancellor: What to do with this man...
Burn him at the stake? The tickling sentence?
Hang him upside-down?
Or... a guillotine to his neck...
You will be the ones to decide that.
Now, let us begin.

CHANCELLOR: What shall we do with
him?
Fire, pehaps?
Hang him upside down for a few
years?
Or...shall we employ the guillotine?
You, the jury, shall decide
his fate.
Now, let us begin.

The tickling sentence...?

Presiding Judge: Now, defendant Crono!
Take the witness stand.

JUDGE: Crono, you are hereby
ordered to tell the truth!

Pierre: I will begin.
Did Crono truly have any intent
to kidnap? ...no, he did not.
The prosecution claims the defendant
abducted the princess with premeditation,
but is this so? ...no, it is not.
The two met by chance, and there
was nothing intentional about it.

PIERRE: Crono is charged with
　"Premediated Abduction of Royalty."
　The question is, did he kidnap
　Princess Nadia? The answer?
　No, he did not.
　In fact, no "abduction" took place!
　The two met completely by
　accident. In fact, the Princess ASKED
　Crono if SHE could join HIM!

Pierre has a peculiar tendency to ask rhetorical questions and then immediately answer them himself.

Chancellor: Is that really so?
Which of you made the first move?

CHANCELLOR: Is this true? Who actually
started this whole mess?

The player is given a choice here.

Chancellor: Very well!
As you heard, the defendant approached
the princess under the guise of chance.

CHANCELLOR: Just as I suspected!
The defendant deliberately tried to
get near the Princess!

Chancellor: Can you really swear to that?
We have witnesses who say it was
you who collided with her.

CHANCELLOR: Are you sure?
We have witnesses who'll say YOU
were the one that bumped into the
princess.

The scene is replayed. While it's technically true that, as the player's avatar, Crono initiated contact, the replay makes it look more like they ran into each other.

And naturally the chancellor finds a way to make either response look bad.

Chancellor: Then, with the princess
having been invited, he made tracks
to Lucca and her father's show.
Many people bore witness to that.
And then, the two disappeared...
If this isn't kidnapping, then just
what exactly is it?

CHANCELLOR: The Princess then
innocently followed you to
Lucca's little sideshow.
Whereupon you both disappeared!
If that wasn't criminal abduction, I
don't know WHAT is!

Chancellor: I have even caught hold of
several facts that place the defenant's
humanity in question.

CHANCELLOR: And I have facts that
throw the defendant's character into
question!

人間性 (ningensei) refers to humanity as in being humane, not as in being a human being.

Pierre: Objection!
Does that have any relevance to
the current case? ...no, it does not.

Chancellor: Yes. There is a need to make
known the defendant's humanity in order to
demonstrate the accurate of his testimony.

Pierre: Then we shall bring in a witness.
This charming witness will
verify the defendant's integrity.

PIERRE: We have a witness.
A little girl who will vouch for the
character of the defendant.

He brings the little girl into the courtroom.

The girl leaves, and the arguments resume.

Pierre: How about that?
This young man's conduct
is worthy of a medal.

PIERRE: How about that?
Doesn't this young man deserve a
medal?

Pierre walks over to Crono and speaks in an aside.

Pierre: Heh heh...
Looks like it's working.

PIERRE: Whew...
Looks like they're buying it.

Chancellor: The defendant's heartless
personality is obvious.

CHANCELLOR: The defendant's cruelty is
quite evident.

The chancellor brings the little girl into the courtroom.

Chancellor: I suppose you rememer her?
You wouldn't even listen to the request of a
helpless girl who had lost sight of her cat.

CHANCELLOR: You remember HER, don't
you?
The poor little girl who lost her cat?
You wouldn't even listen to her!

Chancellor: Oh... you poor thing...
Thank you.

CHANCELLOR: Oh you poor dear!
Thank you.

The little girl leaves the courtroom.

Chancellor: No further explanation is required.

CHANCELLOR: As you can see, no further
proof is necessary here.

Chancellor: Have you ever committed theft?

CHANCELLOR: Have you ever stolen
anything?

If 「あります。」 / "I have." / "Well...yes." :

Chancellor: See, as he says.
The defendant is lacking in morals.
He even admits it himself.
Please listen. It's a cry for help!

CHANCELLOR: See!
He lacks morals!
This should be on the record!
He's crying out for help!

If 「決してありません。」 / "Absolutely not." / "No! I've never been a thief." :

Chancellor: Don't play dumb.
We have a witness.

CHANCELLOR: DO NOT feign ignorance!
We have a witness.

The chancellor brings the old man in.

The scene is replayed, and then the old man leaves the courtroom.

Chancellor: There is no room for sympathy
for a defendant who would even deprive an
honestly living man of his faint pleasures.

CHANCELLOR: Let the record show that
he stole from a poor, helpless man!

Pierre: The problem is motive.
Where is there a motive for
this citizen to kidnap Princess
Marledia? ...no, there is none.

PIERRE: The issue here is MOTIVE.
Was there any motive for this fine
young citizen to kidnap Princess Nadia?
No! There was none.

Chancellor: Sorry to contradict you,
but what if I say your purpose
is her wealth, Crono?
You had your sights on the
princess's wealth, didn't you?

What, they don't even mention perhaps the most the obvious reason for a virile young man to run off with an attractive young woman? In a game from Japan? Maybe they're avoiding it to keep things from getting even more sidetracked... or possibly the chancellor just doesn't understand the concept to begin with.

Chancellor: Do you truly have
no interest in her wealth?

CHANCELLOR: Are you sure?
You really weren't tempted?

Chancellor: W-well, all right.
No further questions.

CHANCELLOR: That's enough.
I have no more questions.

Chancellor: It seems he's openly admitted it.

CHANCELLOR: So, you admit it!

The chancellor will not consider it necessary to bring any witnesses to make his point after Crono admits an interest in her wealth, or if he denies it the first time but answers the second question with:

Chancellor: Everyone, please keep
his words just now firmly in mind.
The defendant said he has no
interest in her wealth.
Now for the witness.

CHANCELLOR: Please keep in mind that
he just said he had NO interest in her
fortune.
Witness please!

The chancellor brings a young woman in.

If applicable, she adds the following line, then the corresponding scene is replayed.

If applicable, she adds the following line, then the corresponding scene is replayed.

If applicable, she adds the following line, then the corresponding scene is replayed.

But wait, there's still room to make things worse. Remember when Marle stopped to buy candy? I hope you didn't rush her.

Chancellor: Finally, let us bring this to a
finish with some conclusive testimony.

CHANCELLOR: And this person's final bit
of testimony will prove our case!

The scene is replayed, complete with Marle's rather damning complaint about him yanking on her arm like a kidnapper.

The young woman leaves the courtroom.

The arguments finally come to a conclusion.

Pierre: As you can see, this young
man has a strong sense of justice.
Now, your honor, the verdict?

PIERRE: It is evident that my client is a
fine, noble young man!
Your honor, the defense rests.

Chancellor: I have nothing more to say.
Your honor, the verdict?

CHANCELLOR: Nothing more your honor.
The prosecution rests.

You'd think Pierre would call the princess as a witness, or at least bring up the fact that Crono brought her back to the castle unharmed and without making any demands. After all, why would a kidnapper do something like that? Sure, the chancellor could argue he was just having second thoughts and got cold feet, but even if the court agreed, Pierre still ought to be able to use that as grounds to call for leniency.

Presiding Judge: Jurors.
Go, those who hold him guilty to the left,
those who hold him not guilty to the right!

JUDGE: Members of the jury...
If he is guilty, stand to the left.
If innocent, stand to the right.

One after another, seven jurors walk into the room. Their opinions mostly depend on how the trial went. Each of them may independently decide either guilty or not guilty. The crowd cheers for each guilty vote, and boos at each not guilty. The judge pounds his gavel and yells above the noise.

Note also that unanimous and a majority are quite different.

The crowd boos again.

Two soldiers enter to escort Crono to confinement, but Marle rushes in before they can do anything.

The king strides in after Marle.

King Guardia: Behave yourself!
Marledia!

King Guardia: I simply want you to
remain in the castle and conduct
yourself like a proper princess.
Even a king or a princess must
abide by the country's rules...
Leave the rest to the chancellor.
Marledia, forget about what
happened in the town.

KING: All I asked was for you to
behave like a princess.
Even royalty must obey rules.
Leave the rest up to the Chancellor
and forget about the events in town.

King Guardia: Come on, we're leaving!

KING: We're leaving!

By the way, remember that line about how even a king or princess must abide by the country's rules during the Prismatic Shell sidequest...

The whole time the king is talking to her, Marle is shaking her head, not listening. When he finishes, he leaves, and the soldiers remove Crono. 1-22 隠された事実 (Concealed Truth), plays. Marle runs halfway to the door, then drops to her knees.

The internal storyline progression tracking variable is now 0x2D, starting the next chapter.

Nothing in this chapter had to do with time travel, so clearly it hasn't changed the past at all. Even its impact on the Modern Age seems to be largely negligible for anyone not either directly involved or close to those who are.

Crono's trial does an excellent job of giving the player a large number of choices with immediate and tangible effects... but they're ultimately meaningless. Regardless of how incriminating or blameless Crono's actions were, he's thrown in the dungeon. And that's just the beginning...