The Front Triggers and Draw Trigger are just Buddyfight's version of the effect triggers.

Ultimate Buddy (Critical Trigger)

Choose one of your rear-guards, and put this card as its Buddy Soul.

CONT: If this card is a Buddy Soul to your rear-guard, that unit gets "CONT: SOULGUARD"

CONT: During your opponent's turn, this card may be called to (GC) as a trigger unit, and becomes a Guardian with grade 0 / SLD 15000.