Yarnball

 is Jester's moorbounder. As an NPC, is played by Matthew Mercer.

Appearance
A younger and somewhat "special" moorbounder, Yarnball seems interested in food and little else. Its eyes blink at irregular intervals.

Personality
Bloodthirsty, violent and extremely aggressive as one might expect of an apex predator, although it is somewhat gentler in its interactions with Jester, with whom it has has formed a strong bond.

Background
Yarnball was raised by Zorth, a goblin who trains moorbounders for a living in the city of Asarius (City of Beasts) in Wynandir. He was bonded to and trained by Jester.

Moorbounders are voracious eaters and are not cheap to maintain as they require food every day, unlike many predators. However, they are also rather independent and do not need to be restrained when travelling with the group as they hunt for themselves at night, returning to the camp to rest once fed. They also provide extra security, as demonstrated when the Mighty Nein awoke one morning to find their mounts feeding on a large wolf that had ventured too close to the camp.

Relationships

 * Jester: Owner/rider.
 * Jannik: Caleb's mount and part of the hunting pack.
 * Clarabelle: Caduceus' mount and part of the hunting pack.