Unique Lava Girl. Ruby can be recruited only if the MC chose Fire Affinity or the Elementalist profession. She can be found in a Town Forest event, past day 10. She will request training, after which she will offer to join. She comes with 300 gold and 2 Lavorms.
Combat wise Ruby has less power than a regular Lava Girl, but better Health, Mana and Lust growth as well as a good set of offensive skills.