so, this is a farewell, ririmu so sad...but ichigo has matured a lot she thinks, even though he not a shinigami any more, its sad and heart breaking for her princess heart because when he met rukia it was her that lost her powers, and ichigo was the one that became a shinigami, but now its reversed, but back then, when that happened...it was raining, and now its all clear, the weather is clear

so, that means he wont be able to see Rukia any more or other shinigamis, so its the final goodbye (she thinks)