I think that whilst Zessica's turn is coming up, I'll stick to Mikono x Amata strongly as end point. Right now, they're the only characters with the strongest connection in the love triangle. Maybe that'll change as Zessica gets more attached to Amata.
Onto spoilerish stuff:
Spoiler for episode 6, theories:
I think that Kagura and Amata are both reincarnations of Apollo (Apollonius). Given that Amata states that he feels like he's met Kagura before, I think that theory is starting to hold water. Amata has the wings so Kagura must hold something else to him, besides the familiar aura. Mikono also states she feels like she's met Kagura before, which holds the theory of her being the reincarnation of Silvia. But I believe that Zessica is a part of her too, so I think they are both the reincarnation of her. Mikono just seems to be the lighter side and Zessica has the attitude.
My opinion is bound to change with future episodes, but I think I'll hold this theory for a while, at least till the next four episodes come out.
I also think, based on the opening, that Amata and Kagura will have a big dogfight. I won't be shocked, given that they are on two different sides, but Kawamori has had a habit of showing the dogfights in the openings as to state they will happen (like with Alto and Brera in Macross Frontier).