Sun square Mars (orb 1°) creates concrete friction between the two planets. The orb is very tight; this describes a stable character pattern more than a passing reaction.
Here, Sun in Gemini in House 9 brings identity, ego, father figure, visibility, and direction into House 9 (vision, belief, study, and wider horizons), with Gemini style (curiosity, language, movement, and mental adaptation); Mars in Pisces in House 6 brings action, courage, competition, and effort into House 6 (daily work, technique, and bodily discipline), with Pisces style (imagination, faith, compassion, dream, and permeability).
Concrete friction: this aspect creates visible tension between ego, father image, and action: will can feel attacked, blocked, or forced to prove strength, sometimes through a weak, absent, inhibiting, or castrating father image. Visible angle: Mars near the Descendant (orb 5.2°) touches an angle; this aspect is easier to notice through direct relationships, partners, opponents, and the way others are met. House 9 (vision, belief, study, and wider horizons) is in friction with House 6 (daily work, technique, and bodily discipline); this can create blockage, inhibition, overreaction, or repeated conflict between the two fields.