This leads him to be very fearful of what his power can do to normal humans, causing him to only use it to save and kill the people that have fallen. Soon after Rai found him, Ren's mother went insane, trying to force Ren to sleep with her, and upon his refusal, set herself and their house on fire.
This instills a deep fear in him about the effects his power could have on ordinary humans, leading him to apply it only for saving and eliminating those who are down. Soon after Rai discovered him, Ren's mother became unstable, trying to force Ren into bed with her, and when he refused, she set herself and their home ablaze.