[He watches Tifa a moment longer before he tilts his head down, his hat once again concealing his face.]

I hurt you. I didn't know. I'm sorry.

[It's not a direct apology for stealing, but he is sorry for hurting her. The last thing he wants is for his efforts to ease someone's pain to cause someone else to hurt instead.]

I wouldn't know what to paint. I only know what he told me... I don't know what shapes would help. Only colors.

[And he's not exactly a stellar artist, so maybe that's for the best.]

But he knows. He can shape the colors in the way that makes him happiest.

[So, in short, he's just planning to take him the paint and call it a job well done.]