Ulphia was said to be a young girl living on the banks of the Noye, who was determined not to marry, despite having a number of suitors.

One day, she was so tired that she slept through when Domitius knocked at her door, and he, thinking she had already gone on ahead, left without her.

Legend states that Ulphia placed the frogs in the area around her under interdict as a result of their loud croaking, which kept her awake at nights.

A 19th century hagiographer noted that the frogs in the area around the oratory of Saint Ulphia were, indeed, very quiet.

In iconography, she is depicted as a young nun seated in prayer on a rock with a frog in the pool near her.