Originally born to Eldar Nobility, one of the first children birthed after the fall within the pseudo space of Commoragh. While she grew, the Eldar were still reeling from the catastrophic events that created the Eye of Terror, and Commoragh was still forming into the Dark City it is today, her parents were very much set in the Old Ways.

While she was raised under the old ways, her greatest pleasures as a youngling involved stalking through the magnificent gardens of her families holdings, catching and torturing the rats and creatures that invested the city. She eventually started experimenting on them, stitching together her first monstrosities as a young woman. As things in the Dark City began to change, as the Dark Eldar began to form, She eventually became disillusioned by the 'Old Guard', joining one of the fledgling Flesh Cults and in turn becoming one of the first of what would become the Haemonculi. Moving in the shadows, learning from her kin and slowly perfecting her craft.

Continuing her love of creating abominations from rats, she experimented with combining the rodents with those unfortunate enough to cross her path, eventually perfecting genetic manipulation techniques to change her minions from Eldar or Man into a stooped man-rat creature. Decades after leaving, she returned to her families towers, leaving the shadows she had hidden in for so long, with an army of ratmen at her command. She swept the estate, claiming her heritage and giving her former family the option to either join her willingly as a fleshworker, or join her regardless as a member of her vermin forces.

For a time she was content, she had ample wealth and power, and a constant stream of subjects to experiment on. She set up magnificent laboratories among the trees and gardens she'd loved as a child, but eventually she grew bored and ultimately, turned on her own flesh, combining herself with the trees she found so glorious for so long, locking herself away until she felt she'd achieved perfection, combining as much of herself with the trees, as she did the trees to herself.

The addition of the plant like material to her flesh further warped her mind. She became restless, combining flesh and wood with those she thought slighted her to create Grotesques, and living trees with which she communes. Eventually, the trees became a Haemonculi in their own right, doing work alongside their mistress. Starting to make raids on realspace, where she first saw the Dark Eldars ancient Craftworld kin, and their psychic might.

Becoming obsessed with these eldritch powers yet knowing it was the one thing she could not pursue within Commoragh, she commisioned shipwrights to build massive engines and make her towers space worthy, turning her estates into 5 massive starships which left the dark city and took up residence in the Thaxar Rift. In their first centuries within the rift the Coven of the Plagued Rat spent hunting and studying human and eldar psykers, learning how their minds work, learning how their powers work. Then Drychera stumbled on to an impressive find. The site of a long finished battle between a craftworld and some unknown foe, but the prize was the burnt out hulk of the Craftworld. From this she was able to claim large amounts of Eldar psychic technology, including the iron statue of khaine from its heart.

The Coven now has a certain mastery over psyker slaves and their power, as well as the ability to awaken the stolen Avatar by sacrificing Eldar souls to its dark shell. Yet Drycheras madness drives her ever forward, hunting for more knowledge and more power.

She has returned to Commoragh to aqquire new technologies developed since her departure, and to capture some Mandrakes to use in her experiments, currently staying at the Tower of Flesh.