[quote=@Vertigo]

- Since Ryuu was pretty turbulent even when young, and I'm shuffling the timeline of his past around anyway, maybe he could've saved another character from a bully/bullies, whether they were friends at the time or he just happened upon a situation where he felt the need to intervene? The whole incident that first got him a bad rap as a violent kid, when he broke a bully's nose.
[/quote]

If it works out timeline-wise that this happened on one of his earlier visits, he could well have rescued Koharu? Back when she was in her timid phase.