A man is reborn as a Warrior of Light to fend off an incoming darkness threatening a world already under threat by the Will of Destruction. Self Inserted Original Character as brother to Kiana Kaslana (Sirin) and Durandal (Kiana)

I'm thinking in subtly adding Kamen Riders in the Miraculous Ladybug series Obviously the two properties are not mine!

One day, Rimuru wakes up only to find that he's once again been reincarnated into another world. Only instead of being a Slime, he's been reincarnated as something completely different, a Sword? How will Rimuru get used to a new world that goes by a completely different set of laws?

Lumine was minding her own business when a Fatui suddenly ambushed her. That very Fatui was a Harbinger, Rank 3 "The Doctor". With her consciousness fading she began to assume the very worst. She thought she heard a voice before she completely became unconscious. "Get..away...from-...sister!" When she had come to again, all she saw around her were rocks and rock walls in an unbelievable darkness. It was there that she met a slime and began her "Journey" on Tensura.