User blog comment:Hakai Suu/Questions Needing Answers (Not Mandatory)/@comment-26087580-20160830025238

Remembering that sealing is a special and exclusive technique that is actually a form of prison for strong creatures, so having a Yuki-Onna, a relatively harmless inside a scare gear would be too much of a stretch, unless she's some king of queen of Yuuki-onnas or something. It'd be like sealing Gamakichi inside naruto.

Albion, Ddraig, Vritra and Barlor were sealed inside sacred gears because they're too dangerous to roam around free or reincarnate, that's why they're sealed inside sacred gears. Instead, why don't a normal sacred gear with the power to control ice, and that's it?