I'm not sure when Davesprite's death is going down but if he's still around and Machi starts turning his attention towards other targets--and if he's known to be definitely going after the Grail, and violently so, and especially if he shows interest in Xion--he'll be so down to rumble. If Machi wouldn't go after Xion, Davesprite could still jump to conclusions. He's an overprotective guy. He has knight problems.