Tate no Yuusha no Nariagari - Vol. 7 Ch. 28.5

[MangaDex]

 

[Xystus]

Gon: Looks legit to me.

 

[ryouhira]

she used to be pet of a hero right?

 

[Hammerfell]

I wonder if Frieren is based on Fitoria... both long living, powerful and cold but instead she can remember stuff!

 

[arcsalvo]

So she's from the Son Gohan (the Grandpa) school of Martial Arts.