Fortunately, thanks to Gako’s info, I can fill in a lot of gaps.
Goma and Isalia were companions of Yulia, both very strong in their own right. Goma is a goblin native to this floor, while Isalia is from The Deep, which is a floor connected to this one by an elevator. It seems the two of them were visiting there when the cable was cut by Lord Windtrace to keep them away. Magritte was a goblin who led the others, and a former Chosen, but it seems she’s been overthrown. Izzy is the son of Goma. Due to the… unique circumstances of his conception, he’s a mix of goblin, angel, and more, so I can only guess as to what kind of abilities he has. Goma, Isalia, and the other goblins were raising him but it sounds like Lord Windtrace has been a bad example for him. The elves on this floor were all men, because their mistreatment of their women caused those women to all flee to The Deep. They don’t deserve any pity.
For now, I think we should continue down this path, and keep Gako with us for her safety. I think we should see what else is going on on this floor before we confront Windtrace, and also deal with The Breaker before that to avoid having to deal with both at once.