I think Rika will die, because she is lowly educated woman in her 20's , she has financial difficulties, she has to feed 4 teenagers by working as a wrestler. She needs to escape from her miserable life
In tOh great's works The bad guy Always pick lowly educated women because they will believe in everything that he says. The only question is whether Rika will die because she wants to always be with sora (suicide) sacrifice herself to save Ikki ( taking the fatal that is meant for our hero).