Set before him had to be one of his more admittedly amusing-- bonds? Was he even allowed to call it such if they met for a grand total of twice?
Irregardless, it'd be that fun Halloween day that managed to strike a pearl of fondness in his heart. Always promising a chuckle and a wish for Hotaru's wellbeing on those dim or wayward days.
Was he technically helping her day if he made her briefly bounce akin to a shocked rabbit? (Maybe Pikachu would be better fitting.)
"Sora." He adds in, almost a touch too adamantly. His era of having floating in and out the edge of a universe's line of memories had him paranoid enough. If filling in that blank was required, so be.. it.
WAIT WHAT DAY DID SHE SAY IT WAS!?
Before anything else left his mouth, that abrupt admittance made him blink owlishly at Hotaru before an abrupt shimmer of determination.
"Man, how lucky is that. On a holiday, then your birthday? I might have a knack for this!" As if he should be proud of such details to begin with! Yet, that infectious smile showed nothing but genuine happiness for her existence as he gives a brief but polite bow.
"Then from one traveling soul to you, I'd like to wish you a Happy Birthday! How about I cover the price for your sweets ah.." Try as he might with scratching his mind, realizing he fell into a similar boat, a bubbling bit of laughter escaped him.
"Sheesh, we never even got on the naming basis, huh? Would it be okay if I got yours? Or should I just call ya Ms.Mimikyu?"