I hate Evokers because Persona 3, for whatever reason, wanted to come across as grimdark as possible.
That whole fluke with the intro where that girl (forget her name...the one who uses the bow and is in pink) was in the bathroom with the gun, looking like she was about to commit suicide.
That shit was disgusting. Yeah, I got used to it as I played through the game, but at no point did I see anything narratively needing them to have items that looked like guns to be pointed at their heads, pulling the triggers, to summon their personas.
P3 almost fetishizes the act. It's gross. I chalk up the decision to have the character shoot themselves in the head repeatedly was because Atlus had little awareness of the actual age demographic they wanted to portray.
I understand it looks cool, but considering folks actually shoot themselves in the head, kids and adults both, I strongly disagree with Evokers being used in P3 as being good or even anything close to being praised. To gamify such an act without taking into consideration the gravity behind why people actually shoot themselves in the head, IMO, is a serious lapse of judgement from the creators of P3 who, again, made a game to portray youth of a certain age demographic.
*steps off soapbox*