Well, considering she's Saber with different colored eyes, 2cm shorter, larger breasts, and a slightly tweaked ahoge, and Saber's been said to be a near perfect match for Jeanne, it stands to reason that Nero would be too.
Dang it Avalon, you c(XD LOL)-block Shirou and Reinforce, but don't protect his mind in other ways? What is wrong, you woman?
Friendship, be made! Magical power, gather! Starlight Breaker.... this world!