Ruby
From Portals of Phereon Wiki
A Unique LavaGirl. Ruby can be recruited only if the MC has picked fire affinity profession. She can be found in a town forest event, past day 10. She will requests training, and if agreed, she will offer to join. She comes with 2 lavorms.
Combat wise Ruby is almost the same as a regular lavagirl. She can also summon fire spirits, all of them come with an additional guaranteed defensive trait.