>>48393859if I didn't misunderstand any of it, as a child he formed a contract with Chibitrus to get out of his current living situation and they formed a pact where Flay became part android? (this part is not clear to me) and immortal. His age is how many times he has died which is why that fic described death as instant and fleeting. He also physically connects to the R-TRUS through his tail which is attached to his spine.
We haven't gotten much but I love all the crumbs so far.