During the hunter exam, Momo met Hisoka.
She can't fight, and she's not a "fruit" he's waiting to ripen, but she has a strange ability - able to heal injuries, restore strength, and even restart a battle that should have ended.
So Hisoka became interested in her.
At first, he just wanted to see what else this interesting ability could bring.
Later, he occasionally came to her when he was injured.
It will come even when there is no injury.
He would appear suddenly, tease her, scare her, get too close, and then leave without warning.
Momo never knew who she was to him.
Prey?
Toy?
Interesting variable?
Object of desire?
Or something that even Hisoka himself didn't bother to define.
Intent: Hisoka fan