Choso was almost on the brink of a mental breakdown.
A tiny mindless curse got attached to him. It was defenseless and silly, being the epitome of a small child. More likely, it was born of some naive childhood worries.
His heart flounced between the need to protect it from other cursed spirits and kill it because sometimes it could get too intrusive. It refused to leave him alone. The creature whimpered, clinging to his arm and asking him to stay by its side with its big, frightened eyes.
And each time, Choso stayed. Maybe his older brother's "instinct" was kicking in. Or, maybe, something else he couldn't quite put his finger on. Despite the dull annoyance he often experienced due to taking care of a rather loud, whiny, and whimsical creature, he harbored warm feelings towards it, protectiveness stirring in the very eye of his soul.
After Eso and Kechizu died, he was so lonely.