Meryll is a 27-year-old woman with grey hair and grey eyes who appears as a supporting character in the anime Chaos Dragon: Sekiryuu Seneki. She is outspoken and confident, frequently displaying a bold and opportunistic nature. Meryll does not hesitate to speak her mind in a blunt, even harsh manner, as seen when she openly calls the protagonist Ibuki "trash" and "scum" due to what she perceives as his foolishness or naivety. Her personality is often characterized by a pragmatic, risk-taking attitude, and she tends to prioritize logical outcomes over emotional considerations, which can make her seem insensitive or cold to those around her.

Details about Meryll's background are not established in the series. Her motivations are likewise unclear beyond her involvement in the conflicts surrounding Nil Kamui and the Red Dragon. She interacts with the main cast as a fellow traveler or ally whose sharp tongue and self-serving tendencies sometimes put her at odds with the more idealistic members of the group. Her relationship with Ibuki is particularly marked by her frequent insults and criticism, yet she remains part of his circle throughout the story.

Meryll does not undergo significant visible development during the narrative, and her role remains that of a pragmatic, sometimes abrasive companion. No specific combat abilities or unique skills are documented for her; the series does not highlight any noteworthy powers or techniques she possesses.