Mrs. X

X Gon Take It From Ya
Believed to be a modified T-103 given female characteristics, T-00F "Mrs. X" to become appealing to subject AR-001, was tasked with retrieving the case to HQ. However, showing the short time span to develop it, it seems the unit lost it's mental imprinting and became interested in gaining the material for its own reasons, as it is believed started to think if could put use to it, even though as a BOW unit T-00F has no sexual characteristics outside the visible ones and no mating capabilities (it is unknown if it is aware of this).

Season 1
The unit infiltrates The Final Rumble and tries to locate The Case of Sperm.

Episode 3
Perceiving Claire Redfield as the greatest competitor to her goal, she becomes her target and tries to destroy her, managing to escape the cage.

Episode 5
Teaming up with an infected, they take on Claire and Jill Valentine to try and eliminate candidates for the case, but are unsuccessful.

Episode 6
Instead she sets her sights on the source, but Ada Wong turns into her next target instead.

Episode 8
When the conflict of Team NWF and Team FMS is over, she participates in a fierce battle for the remaining case of sperm, but Claire wins.

Season 2
After her failure to fulfill its objective, Mrs. X vanishes.

Season 3
Appears during the Dimensional Merge, perhaps brought into the past in search of meaning.

Season 4
She's employed by Kojima and returns to the ring.

Episode 3
Teams up with Mr. X to try and bring the championship victory to Umbrella.

Episode 4
Fights another tournament competitor Red for a punishment of a silly costume to wear.

Episode 5
KOJIMA BROKE HER FUCKING EYE INSTEAD THAT'S NOT A COSTUME.

Episode 9
When everyone else ran away, Mrs. X took the challenge as Tyrants cannot feel fear, but especially because Kojima damaged her eye, and her programming obliged to retaliate against him, betraying him.

Sadly, little she could do against an artificial Stand user.

Season 6
She left wrestling after the defeat of Kojima, wandering as a giant Tyrant mommy instead.

Visited a nearby hot springs along with other TFR females at some point... and the Aspect Rean duo.