While I am definitely not in favor of a Dark jaina alternative instead of Jacen(for various reasons-namely Jaina has no reason to listen to Lumiya)-a Jaina-Lumiya dynamic in itself feels fascinating. Lumiya seeing more of herself in Jaina, and being more overtly sentimental than the semi professional relationship with Jacen(I say semi professional because Lumiya does give her life for Jacen)-the burden of the sword of the Jedi title, and failed Emperor's hand.
You know what-the idea actually works more than I thought? Jaina's relationships with men? Bitter-she burned her bridges with Jag, and Zekk his a friend only, Lumiya's...mixed relationship with Luke to say the least, the shared sense of being damaged vessels, or instrumentality. Jaina was told outright her destiny was sacrifice and loneliness, Lumiya has been terribly lonely for decades.
Jaina would remind Lumiya of who she might have been-had Shira Brie not been shot down, and Jaina might see Lumiya as a warning as to what "Always you shall be in the front rank, a burning brand to your enemies, a brilliant fire to your friends. Yours is a restless life, and never shall you know peace, though you shall be blessed for the peace that you bring to others. Take comfort in the fact that, though you stand tall and alone, others take shelter in the shadow that you cast." really means.
Compare this with "Come Lumiya you will be an instrument of my will" (Essential guide to the Force, Palpatine overheard in a Mara flashback)-Lumiya's own prolonged burden-heir to the Banite sith legacy(something she took up for herself) up to basically seeing Jacen's corruption as her life being basically complete, and her conviction of reforming the Sith into being self effacing utilitarians rather than egoistic warlord sorcerors as something she follows more out of trauma and residual hierarchical allegiance(Palpatine and Vader are long gone after all).
The common underlying theme is burden...burden and obligation. That being the expectation(either internalized or directly imposed) that their personal desires and freedom be sacrificed-for "the greater good" and the profound alienation and pain this creates.
Lumiya's own outsider knowledge-someone who knew Luke and Leia from a very early time, and the "oldest surviving enemy of the skysolo clan" POV-could also give Jaina a degree of insight into what exactly she is expected to serve-"I knew your uncle when he was just an over eager naive pilot"
So...there's more shared ground if not for romance-than at least mutual commiseration or empathy than I thought when writing this.
@magnetarbeam you might find this fascinating.















