Cynthia was Claymore No. 14 of the 132nd generation in the Organization and one of the 7 survivors of the Northern Campaign (see Seven Ghosts) Cynthia wears her hair braided in a pair of plaits, hung forward over her shoulders. Before the time skip she wore the standard Claymore uniform. She currently wears a slight variant of the same dark outfit of all the Seven Ghosts without a skirt. She is usually seen smiling. Cynthia's personality seems to be ever cheerful and hopeful despite all that she and the group have gone through, and she is sometimes seen playfully teasing her comrades. She is often seen smiling and displaying a very expressive face. However, beneath her easygoing exterior, she seems to be quite vengeful, stating that she continued living in order to avenge Veronica. She is seen smiling most of the time. She is rather humble and considers herself to be the most weak-willed among the seven Claymores who survived the Northern Campaign.[1] Cynthia is one of 24 Claymores sent to battle in the Northern Campaign. She was part of Veronica's team, along with Helen (No. 22), Pamela (No. 35) and Matilda (No. 41). Cynthia was the highest ranked Claymore present, outside of the team captains, being only one rank lower than her captain Veronica.

In the first battle, Cynthia and the rest of Veronica's team arrived as back up for Jean's team, which had been defeated by the flying Awakened Being. Helen and Jean disarmed it while Veronica and Cynthia finished it off. Cynthia complained about being the one to get injured while finishing it off, but Veronica reminded her it was because they were defensive Claymores.

She tried to defend Veronica from Rigardo during the second battle, but failed and Veronica was cut in half. She subsequently tried to attack Rigardo for revenge, but he easily evaded it and left to attack Jean. Ultimately, Cynthia was one of the six Claymores left standing after Rigardo's death and took part in the last stand with Miria, Clare, Helen, Deneve and Zelda.