I can honestly say its been a really long time since Rico has used this form. He calls it "shade" its his first stage transformation, basically his senses are heightened and run on adrenaline, hes not that much stronger or faster like this, just can respond and react much faster than normal and is a bit more hostile and less concerned about hurting you. the form itself is nothing spectacular of course. his sister Victoria can also transform into this
oh shade how i have missed you so.
by the way, just so you all know, Rico is one to avoid a fight if he can help it a peaceful pacifist at best. which means if he transforms even to the first stage, then rest assured he intends to kill without hesitation or remorse, and depending on what form he takes will determine how dead he wants his victim to be.