Frieren is a human

In the anime it has said that she has been around for over a 1000 years

Frieren has lived around 300 years long

Frieren was a part of a band of heroes

They decided to split apart after defeating the big bad and would meet up 50 years after

The band of heroes stay by Frieren side until they fall from age

She does feel embarrassment, sadness, and other feeling too. 

Frieren shows no emotion

Frieren silently cares for her friends

Frieren is a strong mage

Frieren likes to collect weird spells

Frieren finds a new group for adventure

Frieren collects things to help her friends become stronger or better

This is a top-tier anime! Frieren Beyond Journey's End is actually one of the best animes out there right now. This anime has blown my mind, yet also gave me some thought about it. If you ever watch this anime give me your thoughts on what you think. And if you haven't watched it, the best time is now! Anyway, good luck and have fun!