-In 3rd year baku spiked kami's food w a potion that made his hair grow into feathers. In revenge kami spiked his shampoo w muggle hair dye (escaping baku's paranoid spell checks). In the end.... lets just say there was an unspoken agreement to leave hair alone after that 😂
It takes a while for baku's owl to warm up to kiri, but to Bakugo's eternal consternation, by the time 5th year rolls around, Baron will burrow into Kiri's side and use him to hide from long distance mail...