Oh, just most of the cast ;__; Here's a few highlights.
Quasannon, Mortimer's niece. Hates his guts because she's convinced he killed his brother deliberately, and is a VERY millitary-minded person as she's constantly afraid of losing even more. On the side, questioning how she wants to present when it comes to gender to begin with, so all stress all the time.
Fangs, fifth "lead" character. He's always grumpy, hates fun, and most of all can barely go a day without arguing with Spinelthorn because they find each other revolting, but still helps out even if complaining all the way. Seemingly a very debt-minded person, and he gives some fun interactions.
Phantasmata might be a few YEARS ahead, but she was the first villain designed for the comic(but never the main one(s)). She uses a substance called "sable spirits" to bring nightmares into the real world, causing destruction and fueling her obsession with research to melt dream and reality together.