Square-Enix Star Ocean 1: Marvel Frozen's mystery

Hmm...as I researched Marvel's character on GameFAQs, I noticed she sold her body to an ancient race to avenge her murdered family. However, she seems to have a connection to Joshua Jerand's abducted sister Elise -- a connection she seems to protect at all costs, even if it means death. WHen you visit the roon with Elise frozen in a blcok of ice, and both Marvel AND Joshua are in the party, Marvel will say something about fighting you, Elise becomes free, and both Elise and Marvel "cease to exist". Likewise, if you have neither Joshua nor Marvel, Elise will break free and vanish, and so will Marvel back in Ecdart. What do you think is the connection btwn those two?

I believe Elise was the "binding contract" that made Marvel continue to exist in Roak. If Elise ever became free, both she and Marvel would die.

Just who IS Marvel, really?