User blog comment:WhiteArmor/7/7/777/@comment-60.48.48.77-20120908045015/@comment-68.117.241.39-20120909021753

2 The dragon's disappear on 7-7-777 because the writers thought they should have the dragons disappear the same day Lucy's mom died. 4. Natsu has memory problems. Example: He couldn't remember who Wendy was. 6. If you look her up online she died of an unknown decease.

These are the answerers I have.