1) A fanbased pairing in Bleach that's most likely established through sympathy towards Orihime's one sided love for Ichigo
(the main character).
2) A tool that serves as a detour to slow down the rapid progress of the ichiruki
does this in order to also emphasize ichigo's popularity as lead character.
3) DOESN'T EXIST.
IchiOri fan: orihime loves ichigo deeply, eversince episode 1. So its destined to happen
Ichiruki fan: She barely talks to him and yet claims love for him? COME ON.