One True Pairing: Naoko and Ueda, with Naoko's mother subtly pushing for it. It helps that the only other recurring male character is Yabe. The problem is, they're hardly ever placed in romantic situations and don't openly display any feelings toward each other. For that matter, both are sometimes openly antagonistic toward each other, so it's more a case of limited casting.
Fan Nickname: Jackoren, to Ren and Jackobel fused form. The author never gave it an official name, thus it is only referred to as Renninger when it talks.