She later tricks Gant into meeting up with her far from the castle so they could go on a date. It is there that they are ambushed by Bern Archers. Celdia fainted after Gant defended her from a volley of arrows, causing him to sustain injury. When she is carried back to the castle by Gant and he explained why he is so loyal to Tiena, she realizes that her jealousy has been getting in the way of his promise and so she goes ahead to find Tiena's whereabouts. After finding her she tells Al and Gant.
After Tiena's rescue she apologizes to Gant for her jealousy. Gant accepts her apology and asks her to guide him through the valley where they met for their date after the war is over.
She later comes to assist Roy's army during the final battle with Bern.
Celdia is illustrated in the trading card game Fire Emblem Cipher with the following cards:
Celdia - Pegasus Princess of Ragna
- Celdia returned to Ragna Castle and become its Marchioness, but her old selfish self disappeared. She flew east and west, poking her nose into other's businesses. She deepened the bonds with her mother's homeland, Ilia. It is said that a Pegasus can always be seen in the skies of Ragna.