※This is all Hidefu's delusions. Please don't take it as fact. See ya!!If we go with my back story for Rinnosuke and Keine being childhood friends...Morichika RinnosukeKamishirasawa KeineThe next child taken in by the temple school after little Rinnosuke. As a child, she had a hard time dealing with people who received her half-beast self coldly, but she cheered up. Her character brightened while she was living with Rinnosuke. As a half-youkai, he understood her well. She adores Rinnosuke, who always protected her from bullies when they were young.
However, the oblivious Rinnosuke doesn't notice...Fujiwara MokouTaken in by the temple school before Keine when he was small. Raised with Keine like her brother. Unlike now, he was cheerful as a child. However, he was unable to keep enduring his temple school friends and others around him dying first, so he left Keine and went off from the village on his own. Later, he met up with the child Sakuya, who'd been spirited away; then he was changed by his encounter with the father of the Kirisame family, and...well, a lot of stuff happened, and it feels like that's how he arrived where he is now... :-)Friends with Rinnosuke and Keine, and boyish of character. If anything, she seems to play often with Rinnosuke, having contests with him using the toy tops he'd discovered, and ultimately getting Keine mad at her. In Bleach terms, the two of them would have an Ichigo-Tatsuki kind of relationship. But actually, even Mokou...might be fun to give a target development. :-)