Zero and Zero Two are the same person

Can be classified as a terrible father

Despite everything, Blade was his favorite, until he too proved to be a failure, it pained him to see his star pupil be led astray by traitorous things such as free will

Thinks friendship is stupid

Refuses to die, and is now being forced to experience friendship. By who? Morpho Knight and Dark Nebula

Zero needs a new band-aid asap

The halo is concentrated positivity that Zero has shed yet keeps around as a defence against any positive charged threats (like a neutralizer)