Considering Dataverse-Ilina is into girls while original Ilina is into guys (despite her first seven kisses being with one girl) it is possible...
In Selenic Shadow, Shana has an alternate form (being a Haze and all) but for Shinica... that Valkyrie's potential story is a mystery... would Shana die, to be replaced by a Valkyrie...?
Shana's tale, too, is not known...
... Potential wiki trivia, all characters in MyChar are ones whose first names start with an "S"...
(This was coincidental; I only realized this today...)
It could be possible that the Dataverse versions of the characters were "idealized" versions of them created by someone. Regarding SeSh, I meant Shana's story being unknown. I already know she has an Awakened form. As for Shinica, she's either a bonus character or she had some involvement in the story due to being a playable character.
Also added the name trivia bit to Selenic Shadow's page.