Agatha is Claymore No. 2 of an unnamed generation. Her nickname is Fresh Blood Agatha (鮮血のアガサ, Senketsu no Agasa). At some point, she reached her limit and Awakened. Agatha has long and wavy auburn hair that reaches her waistline, her hairline forming a point in the front before falling in curls to frame her slender face. The female has a noticeable hourglass figure with large breasts, a small waist, and wide hips. She likes to show off as she appears never wearing clothes, causing quite a few men to stare in a blushing stupor.

With her thick lashes and a sultry smile, she tends to have a permanent half-lidded seductive look, though is quick to temper if things do not go her way. It's also notable that she doesn't have any eyebrows, creating an off-putting look as well.

The first Awakened form she appears in resembles an immense, circular platform supported by 8 crab-like legs, with a mock human body extension atop it. The human form is a decoy, as her true core is deep inside the platform itself, connected to the body by her hair. She later fights in a towering humanoid body though is constantly moving her true form around to avoid being killed. Typically appears calm on the surface, possessing a sadistic nature in her treatment of humans. Seemingly prefers to confront enemies with her hair as opposed to fighting them directly. Her nickname possibly stems from her habit of bathing in the blood of freshly killed humans. If a man strikes her fancy, she'll offer to have sex with him before killing him; Unknown type. Having no Organization datasheet in the "Yoma War Record," her history, swordwomanship, ability, and baselines are very unknown.

The most notable feature is her large mass of hair. Capable of taking any shape or form as she wished, the most notable is that of a massive, eight-legged platform with a mock human form atop, while her vital organs remain hidden underneath. Offensively, Agatha can sprout long tendrils of hair, which she may use to lash out at her enemies or ensnare them in their grip.