I believe this is a reference to the games. It is believed that the reason Okuu got so power full is because Kanako gave her the power, Okuu remembers her as God that she is.
You're god~!eggHey, long time no see.
How's the Yatagarasu?...Who are you?..."Who"..?Traces of a Scorching Hell*sniff*sniff*Even though I'm a 6th-stage boss I guess I'm still easily forgotten~