Melty Blood volume 1 Nasu comments
"At this point, "MELTY BLOOD" caused a major contradiction.
Since this was a fighting game, the position of the protagonist, Tohno Shiki, a character that could participate in combat only by means of trump cards, was reversed, and he became involved in the story as a protagonist that can "fight normally".
"....Right. The characteristics of the characters in "MELTY BLOOD" had either been exaggerated or restrained from what they had been in Tsukihime."
"Using cards as an example, Shiki of Tsukihime would be a 3 of Hearts. But the Shiki of "MELTY BLOOD" would be able to fight normally as a Jack of Spades."
From Comptiq 8 (only a summary of the actual interview so I'll pick it up later to confirm it)