For Bestia's Wrath i have 2 characters who haven't really done much in the story but I think they deserve the spotlight:
Calphayus, my version of a canon character of the same name, is the least threatening person you'll ever meet unless you mess with his garden. He is generally a gentle soul who didn't sign up for the whole Dread Masters business, and he loves tea and gardening. He's also Bestia's dad.
Mu'hass: Bestia's son, he probably took after his grandfather in that he is the most chill dude you will ever meet.
For Lost Firstborn, I'll actually go with V, the protagonist. When they regain their memories and their human(oid) form, they are a calm cheerful person who likes puns and listening to all kinda of music.