After against good Val players with my Bullet, I gotta say that this matchup is 5.5-4.5 Bullet's favor. My reasoning for this is that Valkenhayn is heavily dependent on wolf form for mobility. Bullet's drive at Heat level 1 and 2 shuts down that mobility since Valkenhayn can't block why in wolf form. At full screen, it's best to use afterburner to get heat levels then use 5D and j.D to threaten the Val player. While doing this, back him up into the corner and pressure him with Bullet's mixup game that involves 5D-rapid-5B-stuff, or 6C-j.C-6A, or even attempt to go for the throw. Keep using j.D and 5D at Heat levels 1 and 2 because it is Bullet's lifeline in this matchup that can ensure that she'll be able to stay on the offensive against a strong character like Valkenhayn.