Tietra is Delita's younger sister. Both are children of a simple farmer who lived and worked on land by House Beoulve. Lord Barbaneth Beoulve assumed custody of both Tietra and Delita soon after their parents were taken by the Black Death. She attended the Eagrose Preparatory Akademy with Alma, but her peers would not accept her due to her roots. Tietra Heiral, also known as Teta Hyral, is Delita's sister in Final Fantasy Tactics. She is a commoner girl taken in by the nobleman Barbaneth Beoulve and is friends with his daughter Alma. Tietra has long brown hair, brown eyes, and wears a purple dress. Tietra loves Delita as her brother. She is gentle and speaks only when needed. Tietra was taken in by House Beoulve along with her elder brother, Delita, after their parents died of the Black Death. She befriended Alma Beoulve despite their class difference.

During a Corpse Brigade assassination attempt on Barbaneth's eldest son Dycedarg Beoulve, Gragoroth Levigne attempts to seize Alma, but Dycedarg's brother Zalbaag intervenes. Gragoroth kidnaps Tietra and escapes with her, taking her to the Windmill Hut. Like Gragoroth, the Brigade leader Wiegraf Folles mistakenly believes Tietra is a Beoulve. Meanwhile, Zalbaag readies the Order of the Northern Sky knights for an attack on the Corpse Brigade. Realizing this endangers Tietra, Delita convinces his friend Ramza Beoulve to defy his half-brothers and attempt a rescue but she was killed by algus at Ziekden Fortress.