Can every frieren character (Alive or dead) defend their planet against viltrumite empire invasion?

There a few thing to keep in mind:

•Übel is likely to 1 shot viltrumite because of her magic visualisation.

•Serie has lot of hax and immense mana, frieren lock in.

•Viltrumite has no mana.

•Demon works together with humanity for only this scenario. (Like seriously)

•Any characters from manga frieren is alive same with characters from invincible.

Help me solve this weird thinking in my mind.