SeeleVeli

SeeleVeli is the femslash ship between Seele Vollerei and Veliona from the Honkai fandom.

Azure Waters
Seele and Veliona are alters within the same system. Seele first became aware of Veliona's existence, after Bronya saved her life.

After Sin Mal bushes Bronya down the stairs and breaks her leg, Veliona encourages Seele to confront Sin Mal and "take revenge". Seele agrees, wanting to protect Bronya. During the confrontation, Sin pushes Seele on the ground and begins tearing her shirt off. Veliona says she "can't watch anymore", and fronts. She uses her power to take revenge on Sin for breaking Bronya's leg as well as assaulting Seele.

Later, when Seele is in the Quantum Plane, she attempts to open a "chest" containing her powers. Veliona stops her, saying she isn't ready yet, and that she could die if she opens it. Seele insists on opening it, so Veliona transforms into Sin and pins her to the ground in an attempt to scare her away. Seele pushes her off, yelling that she's not scared of Sin. When that doesn't work, Veliona transforms into Cocolia and tries to talk her out of it. Seele tells her that she can't be stopped, as she's made up her mind. Veliona then transforms into Bronya, hugging Seele and begging her not to leave. Seele speaks to her as if she's Bronya, saying she won't run away because she doesn't want to hurt Bronya with her weakness.

After this, Veliona relents. Smiling, she tells Seele that she's a good girl, and she won't try to stop her any more. She then says that she doesn't know what's ahead, but she will always be with Seele no matter what. The two hold hands and push open the chest together.

Afterwards, Seele's consciousness emerges from the Quantum Plane. After a moment, her body begins to fade away. As it does, a vestige of Veliona wraps her arms around Seele from behind and apologizes, saying Seele's body isn't ready for her power yet. She hears Seele's internal wish to see Bronya one last time, and fronts once again, using her power to run away from the lab and rush back to the orphanage to see Bronya. Assuming Seele is being controlled by the Honkai, Cocolia launches an attack against Veliona. Mechs attack her, and Veliona fights them all off, becoming desperate in her attempt to return Seele to Bronya. Eventually, she gets her to the orphanage, but Seele and her fade away into the Sea of Quanta before they can reunite with Bronya.

Fanon
SeeleVeli is a sort of rarepair in the fandom. It is commonly interpreted in a sisterly way, and may mistake them as being the same person.