Her motivations behind her willingness to provide aid to the various protagonists of the Dragon Age series remains unknown and mysterious, along with the truth of her relationship with her daughter Morrigan.

A subplot which revolve around Morrigan's complicated relationship with her mother in Origins involves her potential discovery of Flemeth's grimoire, which reveals her method of extending her unnaturally long lifespan by possessing her daughters' bodies.

He intentionally wrote Flemeth as an aloof and whimsical character who talks in circles, and rarely provides the individual who converses with her a straight answer.

[5] Gaider considers the resolution of the Morrigan and Flemeth plot in Dragon Age: Inquisition to be the most complex video game scene he has ever written, as it had "three overlapping variants and juggled a lot of different needs".

[9] Having possessed context and insight into the character's motivations and true nature, Mulgrew felt she could "grasp her fury and her power in a different way", and noted that "there's a sense of great adult play".

Flemeth appears in a short prequel web comic for Dragon Age: Origins by the artists of Penny Arcade, released on September 4, 2009.

[12] In Origins, she is first encountered by the latest Grey Wardens recruits of Ferelden, where she hands over a set of ancient treaties and provides advice for their future.

As part of Morrigan's personal quest, the Warden may choose to attack Flemeth and fight her in her High Dragon form, or simply allowing her to leave in peace and take her grimoire.

In Dragon Age II, Flemeth saves the Hawke family along with Aveline Vallen from the darkspawn as they attempt to escape the Blight in Lothering, and implores them to deliver an amulet to the Dalish Keeper Marethari at Sundermount near Kirkwall.

[14] Flemeth has received a positive reception; her enigmatic, transcendent nature has prompted discussions about unresolved stories and sub-plots which involves her within series lore, even after the character's apparent death in Inquisition.

[18] Hawkins wrote that Flemeth is a very distinctive older female video game character as she is "not fragile or terribly kind, nor is she evil and merciless".

[21][22][23] Hawkins commented that Flemeth's costume is "simultaneously plain and imposing, modest and yet sexually-charged", a visual representation of her characteristics which is lacking in most older female characters depicted in popular media.

[24][25] In an essay published in Ctrl-Alt-Play: Essays on Control in Video Gaming, Karl Babij cited the conflict between Morrigan and Flemeth in Origins, with the player character being asked to choose between slaying Flemeth or sparing her and deceiving Morrigan as an example of a truly ethical game structure; since the player must deal with the consequences of their actions as the sole moral agent in the absence of any obvious notion of good or evil, this allows them to exercise full control over the ethics of the given situation.

[26] Janine Hawkins from Paste Magazine noted that Flemeth is generally indifferent about anything that does not directly concern her, but she presents herself as a powerful ally on several occasions.