Maria was kind of like a big sister to Shadow, as she was there during his creation, and she was his first friend, though not much is said about how they met, probably had something to do with Professor Gerald.
Chat with our AI personalities
Shadow loves Maria as a friend but not as a lover
Shadow and Maria are not biologically related, however it's assumed that Shadow and Maria shared a brother-sister bond.
shadow's girlfriend
Shadow doesn't want a girlfriend. He is still sad about the loss of maria, so yeah no girlfriends.
Dude if amy rose it would be shadamy but the problem of shadamy there not balance partners because sonic saved amy but shadow so i think is maria he loves maria i know