User blog comment:Imouto-tan/Sherria Amicus/@comment-4867780-20161108230723/@comment-26362471-20161110231416

The Celestial Key is only partly inspired by Lucy's keys, but I originally got the idea from another anime that used summon-able gates and keys for the bases of Sherria's Keys.

The Universal Safety System can basically manipulate reality on a small scale, allowing its user to undo the effects of certain events, but not totally as its only known functions are it offensive mode which is a super country busting mana cannon and a device that can bring back the dead as mere illusions. It draws the bulk of its power from the Earth's mana so it has a near limitless fuel supply.

I went ahead and changed the name to leeches to reflect its blood sucking nature and awesomeness.

It is indeed based on Ciel's and Shūkurō Tsukishima's own ability, but Sherria is more restricted and specific.

I went ahead and removed that part to give Sherria an interesting Demonbane that totally lacks defense, but has extreme offense and versatility.

Her boobs can in fact detect when danger is near and they bounce when she is in trouble or near danger; it works kind of like precognition in some ways.

Suicide Mirror was the only name that I could think of for it without calling it Black Mist of Death or something like that.