A work in progress, but the point is clear I would think
1) They're just plain cute
2) They're friends as well and I think a relationship could comfortably suit them
3) As for HaynerxOlette, Hayner isn't the nicest or best of friends. In fact sometimes he's a douche, so no. Olette's too good for him
4) Don't care if "it's not real" I like SoNami lol
5) The personalities would balance out without being the same, Olette's gentleness mixed with Roxas' goofyness and other traits.
6) They genuinly care for each other, regardless of the ship or not.
7). "Olette's the Positive to Roxas' negative; Her attitude is much more bright and chipper compared to any of the other characters that fans seriously ship Roxas with (Namine, Xion and... Axel DX) Roxas is a sad guy, and what he needs is a girl that get him to actually be happy."- VirgilTheart
8) "RokuOle is the one pairing with Roxas I can ship without any awkward-ness.I don't like the age difference in AkuRoku. Roxas and Olette are about the same age. RokuShion is selfcest. Luckily, Olette has no connections to Sora. RokuNami is kinda incest to me. Again, Olette has no connections to Sora."- Strawberry
9) As mentioned above, pretty much the most normal Roxas pair.
Overall Supreme Leader