You Were Born Inside Your Head

MADARA UCHIHA, I thought, as hard as my newborn brain could muster. The image of that loveable idiot, filled my mind, and I focused all my rage and frustration into that one thought. If I had to deal with this furry hell, I might as well start with a bang.

The room grew cold, the air crackling with an energy that even a newborn like me could feel. Suddenly, the kitsune's eyes went wide, and he took a step back, his smile slipping for the first time. "What are you-"

But before he could finish, the space around us warped, and the air was filled with the sound of rushing wind. A figure materialized in a burst of light, and there he was: Madara Uchiha.

Or

The mc is an alcoholic depressed 22 years old office worker -whose also a chain smoker- who gets isekai-ed by a weird spirit fox into hxh as Gon's twin with summoning powers, except she just wanted eternal rest aka death