。
She's a person of action.
Literal
She [topic-は] action-oriented is.
The suffix ~的 (てき) attached to a noun creates an adjective meaning 'related to, characterized by, of the X type.' 行動的 ('action-oriented, active') is built on 行動 ('action, behavior'). This ~的 suffix is enormously productive: 国際的 ('international'), 経済的 ('economic'), 一般的 ('general'), 文化的 ('cultural') — all derived na-adjectives from Sino-Japanese roots. As a personality descriptor, 行動的 paints someone who acts decisively rather than overthinking.