Okay, you just made yourself look like a Gaiafag right there, thus invalidating your argument but hey, let's take a look.>Eri X Harima had far more development that Yakumo X Harima, even if a Eri ending would be rushed then Yakumo ending would be even more rushed.
Wrong, what's been developed is "Eri is infatuated with Harima" and more recently "Harima thinks Eri is an okay person". Harima does not, nor has ever, held romantic notions for Eri. There was, however, five seconds for Yakumo.>Also there was a huge flag that Yakumo sees Harima as father as Eri never had such moment.
Eri uses Harima as a replacement for the distance she has with her own family. Fail more.>And Yakumo for most part have been a fucking doormat, the only time she did something was slapping Eri because of Tenma.