Lucina I took from the Fire Emblem character, when picking my name upon figuring out I'm trans, after a few ones that didn't quite fit, I settled on Lucina.
(I say jokingly that I copied what she did, since she also took a name from someone else )

The "Stardust" part came from YGO, and specifically the card "Stardust Dragon" the ace monster of the main protagonist of 5Ds, Yusei Fudo.