active person; doer; person of action
Refers to someone who takes initiative and gets things done, often contrasted with thinkers or planners.
彼は考えるより先に動く、典型的な行動派だ。
He's a typical doer who acts before thinking.
An action-oriented leader is pulling the team forward.
Compound of 行動 (action) and 派 (faction, group). The exact origin is uncertain, but it follows a common pattern for labeling personality types.