To be honest i have not read and probably wont read the book, but i saw a lot of low reviews for being friends with issei, so a 5 review star to balance the things, I get that there are people that doesnโt like Issei, could be various reasons, so instead of review the novel im gonna review Issei as a character
Positive:
Hilarious as a protagonist
A Good person
Would die for the people he cares about
... To be honest i thought there were more to that list of positive things, but rn i canโt think of them
Negative:
Probably the most annoying type of male friend to have, not only is always talking about boobs but also dragging you down by shouting perverted things so that everyone thinks you are like him
Heโs a pervert (Normally i wouldnโt care but itโs the type of pervert that lust after his friends girlfriends, hell he lusted after rias mother...)
Never really used his potential which is annoying to watch the only technique he created was dress break, never tried to even dabble in magic of senjutsu.
Heโs an idiot, not like naruto type idiot were even naruto has plans, no. heโs the type of idiot that would go recklessly to the front to try to punch a mage, idk why any being with a funcional brain cant beat him, i mean really... a hologram of rias naked made out of magic, a rune that drains magic of the one that activates its in the floor, and a sword.and heโs as good as death even sacred gears canโt work without magic...
Conclusion: I wouldnโt kill Issei But i would steal his boosted gear, so i would research a way to steal it without killing him, if times runs out and about to start canon idc anymore and kill him, IN case he survives without boosted gear, i would probably expulse him from the school if he tries to spy on someone i care about.
(idk how would butterfly effect affects him) so if i see him on the path of becoming a rapist probably kill him to give him an honorable death before he does something canon would have hated
Other than that i would probably wont even be his friend, wouldnt want to someone to connect him with me