Both offensive and defensive depending on the person. Bully = offensive Someone using their skills for self protection = defensive.
Definition of OFFENSIVE
a : making attack : aggressive
b : of, relating to, or designed for attack
c : of or relating to an attempt to score in a game or contest; also : of or relating to a team in possession of the ball or puck
: giving painful or unpleasant sensations : nauseous, obnoxious
: causing displeasure or resentment
1. Intended or appropriate for defending; protective.
a. Intended to withstand or deter aggression or attack: a defensive weapons system; defensive behavior.
b. Of or relating to the effort to prevent an opponent from gaining points in a game or athletic contest.
c. Performed so as to avoid risk, danger, or legal liability: defensive driving; defensive medicine,
3. Of or relating to defense.
4. Psychology Constantly protecting oneself from criticism, exposure of one's shortcomings, or other real or perceived threats to the ego.
1. A means of defense.
2. An attitude or position of defense.
on the defensive
Prepared to withstand or counter aggression or attack.