Adjective for someone who accepts all challenges

Question

What's the adjective for someone who accepts any challenge? Let's say a strong knight, who never says no to a challenge. Is there any adjective for it? Or what would be the best way to describe such trait? Thank you in advance.

Answer 1

Closest thing i can think of is:

dauntless

adjective literary

UK /ˈdɔːnt.ləs/ US /ˈdɑːnt.ləs/

showing determination and no fear:

In spite of the scale of the famine, the relief workers struggled on with dauntless optimism.

https://dictionary.cambridge.org/dictionary/english/dauntless

Answer 2

The word I use for this is game:

Who could we talk into jumping off this cliff?
Ask Gordon, he's always game.