Description
Seele Vollerei hails from the Republic of Estonia and was orphaned early in life. Raised at Cocolia's orphanage among displaced children, including Bronya Zaychik and Sin Mal, she formed a close bond with Bronya after witnessing her skills and receiving comfort following bullying incidents. Seele's timidity prevented her from intervening when Sin Mal broke Bronya’s legs out of jealousy. Later, after traffickers kidnapped Seele, Bronya’s rescue triggered her awareness of Veliona, a stigmata-driven inner persona.

Seele possesses a hereditary stigma designating her as a potential vessel for the 6th Herrscher. This stigma manifested Veliona, a separate personality embodying Seele’s repressed emotions. Veliona initially displayed cruelty, sadism, and protectiveness—sharply contrasting Seele’s gentle, meek nature. Veliona retaliated violently against Sin Mal, extracting a tooth and tormenting her in a void dimension. Though ruthless, Veliona gradually developed care for Bronya through Seele’s influence.

To shield Bronya from the X-10 experiment’s dangers, Seele revealed her stigma to Cocolia and replaced Bronya as the test subject. During the experiment, Veliona warned Seele of risks from ancient technology within her stigma, but Seele persisted. The experiment collapsed Seele’s body, trapping her in a quantum state within the Sea of Quanta. Moments before vanishing entirely, she briefly returned to the orphanage, destroying Honkai titans but disappearing just before reaching Bronya, leaving only a hair clip. When Bronya later underwent the X-10 experiment, she entered Seele’s quantum dimension. Seele urged Bronya to return to reality, gifting her a shield that became Project Bunny and securing a promise for reunion.

Rescued after prolonged isolation in the Sea of Quanta, Seele agreed to retrieve the Herrscher Core of Reason in exchange for returning to reality. Following another six-month separation, she reunited with Bronya and joined Schicksal. Post-reunion, Seele exhibited significant maturity—growing assertive, confident, and level-headed while retaining kindness. She actively opposed threats like Vita and embraced her dual existence with Veliona. Veliona evolved into a fiercely protective yet tsundere presence, often masking concern dishonestly and reacting violently to perceived threats. She remained deeply intertwined with Seele, occasionally watching over her sleep.

In Cooking With Valkyries II, Seele appears as a secondary character identified as an orphan, teenager, and scythe wielder.