"You have no right to snatch Touka from your mother"
Powerful words. She may not care about herself, but those who love her do.
Damn, so his wish to save Hise from bullying ended up brainwashing both her and the bullies into being friends. While she was "saved", that's kinda fucked up in and of itself, because that didn't really erase all the bullying that happened before. If she had scars from that she'd still have them even if she lost the memories. And the bullies never got what they deserved.
The star tear is not a true wish granter, it's a thing that falsely bends reality by presenting lies and illusions as "truth". Maybe not an outright monkey's paw, but something close.