For your Omori strikers AU, I personally think that Sunny would definitely be of the Hierophant arcana, Aeon for basil, Tower for Aubrey. Temperance for Hero, and Sun for Kel.
So I looked up the meanings of the arcana you suggested for this ask (I was going to have to do that eventually so yay), and I think your choices for Kel, Hero, and Aubrey are very fitting! (Hope you don't mind I'll definitely be using those suggestions!)
As for Sunny and Basil, I tried looking up clear meanings for Aeon and got a lot of that the arcana sometimes replaces Judgement, so I based more of my research on Judgement rather than Aeon. I honestly think Judgement is a lot more fitting for Sunny than Basil, personally I don't think Hierophant is really fitting for Sunny. I saw your comment on my post about making up arcanas for the faraway gang (and I kept telling myself I'd respond to it, but forgot. oops) and I think your original suggestion for Lovers for Basil is a lot more fitting!
I also saw you originally suggested Moon for Sunny (I also think it's funny how ironic that is ha ha) which I also think is fitting for him! If we go a bit deeper into upright and reverse meaning, I think Sunny would fit the reverse moon while Omori's like the upright moon (though I don't think the persona series really distinguishes between upright and reverse). Haven't decided what I'm doing with Omori's arcana, though if he's Sunny's Shadow then he's probably just the reverse of whatever Sunny's is












