
Originally Posted by
Masamune∙1600
As evidenced by Quina's presence during the ending, Quina obviously does not die.
As to the matter of Quina's gender, it's certainly a topic for debate. It's obvious, though, given the fact that Quina can equip the female-only Lamia's Tiara, but is not Covered by Protect Girls, that the question is meant to be ambiguous.
The primary effect of Quina's Trance is that it changes the Eat command to Cook, a more effective version of Eat. When using the Eat command, the enemy's HP generally needs to be ≤1/8 its max HP for the command to be able to succeed. When Quina is in Trance and uses Cook, the enemy only needs to be at ≤1/4 max HP.
Garnet's Trance changes the Summon command to Eidolon. This allows limited power Eidolons to appear at intervals.