Waver is the co-owner of Inkchanted, an enchanted tattoo parlor in the harbor district that's been around for... wow, like a year and a half now?! He runs the place with Caster Cu and Iskandar, who are both Witches and can do the actual enchanting. Waver, despite being a Monster, is proficient in alchemy and does a lot of work mixing the ink and, less enjoyably but just as important, managing the place.

Inkchanted offers tattoos that work similarly to spell scrolls: you can activate the magic in them at any time, but they last for a much longer period than a spell scroll that's used up. Even Monsters can "use magic" in this way, using stored-up magical energy in a talisman like a battery, which Inkchanted also sells. Things like pendants, bracelets or rings, even belts, etc. Everything is customizable so your character can get whatever kind of tattoo and battery combo they want, enabled with basic spells from elemental types to barriers and even, recently, healing magic (that last is a work in progress...).

Feel free to handwave your character getting a tattoo or two here! They're very likely to see Waver bustling around the place, manning the front desk, or looking grouchy somewhere in a corner when his customer service patience wears out lol