Daphne is the youngest of five princesses from the Yomi Kingdom, featured in "The Underground Empire of Yomi" arc. She possesses deep red eyes lacking visible pupils and sclerae, short spiked red-orange hair like her sisters, and wears a royal white gown and cloak. A tiara with a large deep purple gem adorns her head. Animation sometimes depicts her eyes as black, reflecting her original manga design.

Severe trauma from Zattan oppression fuels Daphne's deep insecurity and emotional vulnerability. This fear propels her to betray her sisters, acting as a double-agent who leaks their plans to the antagonist Van Vogt. She believes rebellion will fail and doom their civilization.

After sisters Dinah and Aphro uncover her treachery, Daphne sees the dire results: her actions endangered sister Vena and the 00 Cyborg team. This confrontation sparks a transformation. Seeking redemption and inspired by Vena's bravery, she resolves to rescue the captured Dr. Gilmore and the cyborgs. This act marks her shift from fearful traitor to committed ally against the Zattan.