If you're up for more RP with Brackenhide, I'd like to offer Coyote?
She's a trickster and is hardly ever serious. She enjoys speaking in riddles, although it's unclear if any of them hold meaning. She's never met anyone with his sort of personality and I don't know how she'd react, so I thought it might be interesting? :3
And if you're still looking for foal RP with Acanthus despite him being an adult, I do have Kali~
In a word, Kali is a follower. She's a quiet and submissive kind of girl who doesn't like attention. She feels awkward and lost if someone isn't telling her where to go and what to do. She will generally gravitate toward those with the qualities of a leader, standing silently in their shadow in hopes of becoming just a bit more like them.