For me as it sits now I'd have to say Rayanne - she's made the ultimate sacrifice for her beliefs to save Asguaard and the people she came to love.
There again it may be to early to tell we don't know how Marine is going to develop or what's likely to happen LF3.
We also have to consider Sandy, she was lovely, soft and gentle and again paid the ultimate price to follow Random, and Luciana lost her husband.
For now I'll say Rayanne with the proviso I may change my mind
