Zen

Zen is an Elf what means, that he can't die, he is also not able to regenarete his body when it comes to life thretening Injurances. So, he loses sometimes randomly his Head so he have a few needles in his had ribbon and Yarn in his Trousers pocket. With one of the keys he can come into a own dimension (This Key have a green stone on it) another looks really old and don't works anymore - it has a black stone on it. He have 2 other Keys that are just random.

He have everytimes closed eyes, just open it when he becomes badass. (Little bit like Subaru from Detective conan^^)

He have really amazing physical abilitys and have the ability of creation in his own dimension (but he can't create life)

He had a boyfriend called Nova, but Sombra killed him. Sombra acts a bit like yandere sometimes, he want's Zen alone. Sombra is also the one who created Zen one time.
Zen had some other people he loves but he wasn't able to tell Sombra because he was afraid that sombra would kill them then - so he became Sombras Boyfriend, later when Sombra died Sasha became his boyfriend for some time.