User blog comment:Bennlimos/HxH Questions & Thoughts Discussion 5/@comment-9409640-20140506185137

1. Don't want to think of it further but I guess it's because of the fact that the Gungi Master was exposed to it during her capture and then eventually get used to it.

2. Coated but with very minimal amount as the Hyakushiki Kannon is an Emission Nen so basically aura must be focused to it, likely to Pitou's Doctor Blythe.

3. Yes. Shippujinrai will overcome it. Refer to its power definition on Killua's page.

4. Killua(Kanmuru), Netero, Meruem, Feitan(Max Speed), Cheetuh, Zeno