>>281802220
That's Mitsuki, a character with a convoluted backstory even for Tenchi.
So, the character originates from Dual! Parallel Trouble Adventure. It's another Kajishima project, kinda like if Evangelion were filtered through Tenchi Muyo.
She's the standard Tsundere, caring but stern towards the MC and her mad scientist father.
The story of Dual canonically takes place billions of years in the past before Tenchi, on a separate but very similar Earth from our Earth.
Somehow, the souls of each of the girls pictured here resonate in the Sea of Souls or something, and manifest repeatedly in GXP, and harmonize with Seina's, whose soul is similar to that of the MC of Dual.

GXP Mitsuki's father was an admirer of Kirika's mom, Tsukiko, while she was in the GP Academy.
She didn't return is affection, and this devastated him to the point that one night, in a fit of madness, he created a robot to her specifications.
In a recognized, but poorly understood phenomenon, she gained a soul and true sentience.
Recognizing that she was not just a copy of another woman but a person unto herself, the scientist resolved to raise her as his daughter instead of a sexbot.
She joined the GP Academy a year ahead of Seina, and while out on a mission was kidnapped and killed by Tyrant Shank, the leader of the most ruthless Space Pirate Guild since Ryoko roamed the stars.(He's also responsible for Mihoshi's condition, but that's another story.
Liberated from her physical form and left as something like a Ghost in the Machine, she haunted Shank's ship's computer until Seina could rescue her.
At the same time, Shank had also kidnapped Fuku, trying to unlock the fearsome mysteries of Cabbit Technology, and managed to make several imperfect clones of her, 3 of which survived.
Mitsuki's soul got transfered into one of them, and she later learned how to transform and regain her former appearance.