The zebra who lives in the Everfree Forest and uses potions is Zecora.
Zecora is introduced in the season-one episode “Bridle Gossip,” where Ponyville’s residents fear her because she enters the Everfree Forest and speaks in mysterious rhymes. Twilight Sparkle and her friends eventually learn that the rumors are wrong: Zecora is kind, knowledgeable, and willing to help.
She lives alone in a hut filled with herbs, plants, and potion-making equipment. Her expertise in herbalism becomes especially important when the ponies suffer the effects of poison joke, a magical plant that causes harmless but embarrassing transformations. Zecora prepares the remedy that cures them, establishing her as a trusted healer and mentor.
Zecora is not a pony, zebra, or generic “zebra” as a name; Zecora is her individual name. She later becomes a recurring ally to Twilight Sparkle, Apple Bloom, and the Cutie Mark Crusaders. Her rhyming couplets, striped design, and potion knowledge make her one of the series’ most recognizable supporting characters.