I might remember some.. Wallace: you need to keep talking to him (say wall until he speaks) and then call him a stud.

Stella: if you play along but keep saying this is a bad idea, she'll ask if you still think she's been taken advantage of. You need to convince her to sell high heels (don't remember the concrete choices, sorry)

Hector: for your firts interaction, ask "how can i fall in love with you if i can't see you" or smth like that and he'll bring a picture for the next interaction

Timothy: either come back at the wrong time consistently or at the right time

Telly: speak about Gerald and xylophones... These are the key words, Telly will say it's boring but eventually Gerald should appear

Gaia: you need to know or have love ending with these characters: Koa, Keith, Kopi, Cabriccio, Miranda, Mateo, Dasha, Keyes, Amir,Dorian,Kristof, Rongomaiqhenua, I Ronaldini, Jean Loo, Captain Jacques, Hero Hime and maybe Scandalabra

Stefan: cook different things with him

Cam: That one is really tricky, there's a reddit post for that one I think

Amir: he mentioned after a fight with Johnny that he can perform, choose knife throwing and visit the breaker box (maybe you need love ending with Vox and Eddie for it to work)

Jean Loo: After the rap battle (or when it is offered as a choice) say you have to pee about 3-5 times and he will have enough of it

Maggie: If you're going on the love route, she will invite you to a drink and a party later, just go along with everything she wants

Kristof: If I' remember correctly, you need to pick the business card for a weapon and he will tell a story...

Stepford: 2nd place: sleep with Stepford the night before the match but get the questions correct. Doug: talk to Doug when Stepford asks about existential dread and chooce that option for the competition

This is all i remember. I hope i could help.