Its pudgy form of a hand takes an pudgier position, and to one of the fingers offered, it shows off its newly learnt greeting from Tidus's heart: bopping the upper side of the finger and then the lower, and then ending it with a straight on fist bump. A set of motions that would make more sense with another fist its own size, but nevertheless-

Nevertheless, Tidus knows exactly what it did, and sits there with a narrowing look that isn't sure what he thinks about that. To Roland? But figures he's not to bothered by the finger-bump, looking back at Roland with a whatever in his head tilt.

"You should keep trying to talk to it anyway. Let it get to know you more! Do you ever just hang out with it? What do you and the small guy do on the train?"

He has no clue himself, actually. Does it just...wander around? Doesn't it disappear randomly? Whatever the case, Hibber-Gibber seems to be making approving noises below. Chip chip, that's the spirit!