According to the guide book Ilya did not show up in any parts of the story that jerry experience indicating that should be the reason Ilya having a lonely childhood because he never met jerry and also it said that Ilya had attachment problems and a twisted personality because of it but since Ilya met jerry and did not in fact experience a lonely childhood so there's high possibility that Ilya won't end up the way the guide book shows
I just realized because of the comments that our mc doesn't have a name or at least that have been mentioned Σ(  ̄□ ̄||)
And here I thought that I just forgot his name because I'm reading a lot of manga...
It keeps true to the mob character fashion of being in the background.
Omg imagine the first time his name is revealed is when he finally ends up with one of the other characters, finally bumping him up from the “mob” label