Solitär

Solitär is an eccentric demon. Unlike most of her relatives, who have devoted their lives to battles and improving magic, she prefers to study natural life. She has extensive knowledge of the biology of living beings and advanced scientific theories, such as the theory of convergent evolution. Solitär seems friendly towards others, even when her kindness doesn't return.

[Spoiler] The great demon, comparable in strength to the «Seven Sages of Destruction». Believes that demons can never experience human feelings, but shows great interest in Macht, calling him charming. She destroyed the barrier holding Macht in the city of Weiss. She died in a duel with Frieren. [/Spoiler]