I think these deities could possibly be trying to help MC in their respective ways, maybe they have their own goals? After all. if I recall correctly, each deity spoke within a certain way similar to how they act while also carrying out a goal in mind for MC.
Green being nice and wanting to help, their goal, perhaps selflessness
Blue's goal is to make him be more assertive,
Purple goal is to make him selfish
Yellow's is to help him establish relationships
But I think I just know better that they all come out when I'm guessing a certain requirement has been hit for them
Purple comes from desires being Revengeful and/or Lustful
Blue comes by chatting being Charismatic and/or Assertive
Green comes to someone in need, being Kind and Soothing
Yellow comes when they spot someone that the MC can relate to, being chatty and nervous(?) possibly outgoing though however
Examples I guess would be:
Purple peeking the bathroom or being hurt
Green helping Natsumi
Blue chatting to Hana and Midori, the way MC speaks to the two character seems to be significantly different
Yellow saying how he recognizes a character to Kaede
MC's aware and I'm guessing, have some limited extent of control over his body whenever those certain emotions come out.
He did refrain hurting someone in public, either the Purple emotion knew of this, or that was him trying his hardest to hold back from doing something he'd really much regret
I don't think he knows why he cant control himself easily though when these certain emotions come out though, he knows it's very unlike him,
especially with how he originally tried to be a prick to Natsumi, just for green to come out, help her and realize a big mistake could've happened had he been a prick, yet he doesn't exactly know why he changed from being a prick to being nice so...
My major question to this is how nobody realizes his eyes changes color each time these certain emotions come out, maybe it's something unique, and something only certain people similar to him can see...
I'm gonna stop my rambling here, I really liked the story so far, but anyways, You're welcome for the condolences, I feel the same way about fictional characters getting help,
I'd want to help people in any way I could, but we're only human, the greatest flaw and blessing we can be granted, so it's hard to do that, I just try my best to not think that and just make whoever I can, feel at least a little cared about and hopefully put a smile on their face, even if it was temporary.
Stuff like "You're not alone" ain't gonna help at all, so I again cheer whoever up in whatever way I can
Hope that one day you'll heal from what you've felt, I just hope it wasn't too terrible...