Agatha looks like a young woman with long blue hair. She has a mole on the corner of her eye.
Agatha initially wears an intricate blue robe with golden trim from her days in the Taquila's Quest Society.
Since Agatha originated from a time when witches reigned supreme, she expressed difficulty in acknowledging anyone else besides fellow witches.
Despite this, she is at least different in terms of showing some forms of compassion towards ordinary mortals, but still regards them as inferior until meeting Roland.
After being convinced of the important role that ordinary people can play with the use of fire-arms and modern technology, she has begun to slowly change her perception of mortals in general.
Agatha notably respects people who are intelligent, regardless if they are witches; she noted Anna, Roland and Kyle would have had a placed in her previous witch organization. At the same time, she retains some slight callousness, such as when she evaluated Summer's magic.
Agatha was a member of the Witch Federation that existed 400 years ago.
Agatha's sister was a member of the Defending Army and never abandoned her post. 
Upon being discovered by the Witch Union, she was shocked to learn that the Federation was no more and that witches are now regarded as Devil's servants by most human kingdoms.
After the Artillary Exercise, she decided to serve under Roland for fighting the Demons in the impending Battle of Divine Will. A year later, she also persuades Phyllis to gather rest of Taquilla Witches and work for Roland.
After joining the Witch Union, she began to work with Kyle Sichi to produce new chemicals for weapons. Roland eventually built her a spellcaster's tower so she could continue her research on magic stones.
Powers & Abilities
Her ability belongs to the summoning type.
Magic Power Form
Her magic power has the form of a sky blue pentagonal prism.
Cold Immunity: Her body automatically expel the slightest chill that made her uncomfortable. The last time she felt cold was before her awakening, and now, she has almost forgotten the feeling.
Ice Generation: She can both use Ice to defend herself or attack.
Agatha was kicked out of witch federation because she refused to comply with the rules of never recruiting common people.
Upon initially meeting Roland, she looked down on him for being a mortal and only wished to talk to the witches.
However her worldview and opinion on Roland completely changed after she witnessed the testing of 152 mm Fortress Cannon. After learning that all the knowledge came from Roland, she decided to join the Witch Union and work for Roland (which was mostly because the contract was too loose and gave her freedom to terminate the contract).
At first she couldn't figure out why she felt comfortable around Roland but later she realised that both of them had the same kind of undefinable estrangement as if they were out of touch with the world, except Roland hid it much better than her.
After living in Neverwinter for quite sometime, she's shown to care about Roland, asking him to take care of his health first.
Along with Wendy and Scroll, Agatha too complains about Roland being too reckless, she usually complains that common people have fragile bodies whenever she's concerned about Roland, like when he was in coma or waved at people in old king's city thereby provoking many unsuccessful assassination attempts.
Agatha is a member of the Union, but rarely interacts socially with her sister witches. The younger witches do not warrant her attention, as they cannot undertand her higher level of thinking. So she mostly talks with Anna, Lucia, Nightingale, Scroll and Wendy; experiments and general information respectively.
The founder of the Eltek Family, Kagar, was Agatha's housekeeper. Sir Eltek and Ferlin Eltek are Kagar's descendants. She was initially hostile, until the Eltek family swore their loyalty to her in honor of Kagar's wish to preserve her legacy.
- Agatha was the youngest high-ranking witch in the Federation.
- She is fond of eating sweet stuff especially honey. This contrasts her sour perosnality.
- Agatha is prideful and is studying chemistry before sleeping to answer the questions of the workers from the Alchemist Workshop from the king's city and maintain her dignity.
- Upon joining Witch Union, she was fifth member with an evolved ability.
- Chapter 374
- Chapter 343
- Chapter 360
- Chapter 348
- Chapter 386
- Chapter 539