Since your paints are based on the one from your teacher, I don't really see it outside of Kuni Schools, but some of the vassal families may be teaching non-Kuni schools and have face paints.
It is mentioned as being destroyed by the Lion clan in the 7th century after turning all into Shadowlands berserker in the clan pack for the Lion. And that all that was said about it.
The Lion clan card pack tells us that a Bear clan existed until the 7th century until it was wiped up by the Lion for being Shadowlands tained berserkers. I would consider rooster for Ryoshun.