No, there was the blue-haired guy too with a similar hairstyle. Otanashi would not mistreat Kanade -- at the very least he'd feel bad about it while so close to her.
It would be something that Hinata would say, if we consider what he said about her in the manga. After all, Otonashi just said, "Oh, okay, she's an angel" when Yuri told him that.
