The language program does not understand him and it has infinite patience. Will he repeat the names of types of fruit and cute mammals?

After a few minutes the door slot closes and an invisible gas floods the room. It won't quite put him to sleep but it should make him weak and dizzy.

...detect... poison...

...Resistance!

He feels weak and dizzy. And of course they're not relying on the gas, they're not stupid, this a noncooperative parahuman with unknown powers.

Four guards (with airtight helmets) enter the room. Two pin him to the wall with riot shields; they will apply only gentle force if he doesn't resist.

Another places the cup in a closed box.

"You wanted my - my fucking cup - why did you even give me the -" He's pretty sure he can't get a Mount off like this and it's a bit late for his Stunning Barrier.

Their task complete, they retreat and lock the door again. The gas slowly clears.

Ten minutes later the slot in the door reopens, and a guard slides in a fresh cup.

He shoves the cup back out again! He'll create water directly above his mouth if they're going to be dicks about cups! What the hell!

...regulations specify it is not abuse to allow a detainee to refuse to have a cup in their room because they can drink directly from the faucet.

Eventually the program tries repeating things he said back to him. Maybe he'll respond or correct it or something. The program doesn't have any real intelligence or initiative but it isn't programmed to give up after a reasonable amount of trying.

"Cup? Fucking cup? Why did you even. I can understand you."

...sporfle. "Can you now? Can you understand me? Did you find yourself a Comprehend Languages wand in a drawer somewhere at long last?"

"Comprehend Languages wand in a drawer. Fucking cup at long last? You're not a fucking dragon."

"No shit I'm not a dragon. I haven't seen any dragons since I showed up here but I haven't seen any at home either, they're not exactly on every street corner. If you try this again tomorrow I can do another ten minutes of Comprehend Languages, if you really do have something to say to me."

He is finally engaging again! The program pings Dragon.

Reviewing, reviewing... hmm. How can she best entice him to cooperate, if he only responds to (presumably nonsensical) strings of words in his own language? If only she knew the meaning of just one or two words they might make some progress!

The sequence "Comprehend Languages" was the first thing he said to Armsmaster and Gallant, without any accompaniment. Then he said something (responding to Gallant?) which also involved "Comprehend Languages". And when the program first tried speaking in his language, he mentioned it again.

There are other sequences that appeared at both times and not in between. (She doesn't know yet how to divide this language into words.) "To me", "say", "to say", but "comprehend languages" is much longer.

What would be the first thing you said to someone you didn't share a language with? There are really too many options. A greeting, an introduction, the name of his language or place of origin, some other concept related to communication...

Dragon doesn't have any good guesses.

Is he willing to state "Comprehend Languages" about a picture of himself? Of Dragon or Armsmaster? Of himself with or without a speech bubble? 

"I don't know why you care so much about whether I remember all your stupid names. If I were you I'd hope the avenger in custody couldn't keep me straight with any thirty other morons."

Alas. 

The program will keep trying, but Dragon doesn't hold out much hope. She lets Armsmaster know.

Eventually we'll have to either release him or press charges. He won't get a long sentence and keeping him is a waste of resources if we'll just release him later. But it's not my decision to make.

The analysis results come in. As far as the lab can tell, the remaining the liquid in the cup is ordinary water.

Did you compare the proportions of dissolved minerals to those of the tap water? He did not fill the cup from the tap before creating the liquid in it.

Dragon is right! The calcium:magnesium ratio is all wrong and there is no trace of any chlorine compounds.

We already knew he created it. There was no reason to expect it would be the same as local tap water.

A day later, the traces of water disappearing from the lab samples go unnoticed.

Several days pass in routine boredom. Raimon is regularly fed and invited to shower daily (by undressing and standing in the shower-y part of the cell). The program keeps nattering at him. Another program is displayed showing a stick figure exercising to cheerful music. Some other people look in a few times but nobody can communicate with him and they leave quickly, having satisfied some byzantine rule or requirement of keeping prisoners.

The system slowly grinds on. There is enough to occupy the Protectorate and the PRT and no pressing reason do anything about the cape in their holding cells before the 30-day window for filing charges expires.

Five days after his arrest, an alarm resounds through the building. The guards talk urgently and leave. There are the sounds of distant explosions.

Some minutes later, a man looks into his cell. He is wearing a red-and-black mask that looks like a child drew a leering devil but (importantly) that child wasn't Chelish and the requisite terror didn't quite come through.

A round later he disappears - instantaneously, like a teleport. A round after that, there is a small explosion right outside his cell and the door swings open.

What a tasteless outfit.

Well, he doesn't know what the exploding guy was about but that doesn't mean he wants to stay here. He walks right through the open door and starts trying to navigate his way out of the building.