Wander Over Yonder

Sylvia is a character from Wander Over Yonder. She is Wander's steed and best friend, who often protects him and the galaxy from various threats.

Sylvia is very strong and enjoys having a good fight when the opportunity arises. Her super strength seems to be a common trait amongst her species, the Zbornaks.

The Cartoon (S02E23)
In Lord Hater's titular cartoon, Wander and Sylvia appears as a pathetic pair of dumb-looking wandering country bumpkins, with Sylvia, in particular, looking like a rotoscoped horse whenever she speaks. However, things change as Wander takes out his banjo and uses it to power-up both him and Sylvia to beat Lord Hater and his Watchdogs.