[Theo just stands there, letting Katsuya get out all of his frustrations, trying to process all the different human emotions the persona-user is going through. Finally, he reaches over with one hand and offers to take the mask from Katsuya, in order to ensure it doesn't get damaged.]

"Perhaps Verity needs her time to think, as do you, Katsuya." [He produces a box for the mask out of nowhere, offering to store the treasure safely, if Katsuya allows it. The next few words tumble out of his mouth without thought.]

"Can I offer you a drink?" [Because, as we've learned in Persona games, alcohol fixes everything. Sort of.]