[Chaos2Frozen]

Originally Posted by Used Can

Have there been more hints on the identity of Hayate's former girlfriend?

No, so far all the hints from the flashbacks that we get is...

Spoiler for what we know to this point:

1. She was be quite violent :heh (Vol 9)

2. She's upset with Hayate before (Chap 144)

3. Hayate apparently still has some feelings for her. (Chap 172)