Turns out Mizi does know about contestants competing against each other and dying, and it was the sole reason she wanted to participate, so she could feel strong.
Basically homegirl just wanted to powertrip and ended up regretting it BIG time
mizi lived a much better life compared to the others, but that doesnt mean she had a good life.
mizi was treasured, but not in the normal way you think it is. she was treasured by aliens who found humans fascinating, but she was treated like some sort of experiment, or a toy.