Mars square Neptune (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, Mars in Capricorn in House 10 brings action, courage, competition, and effort into House 10 (vocation, status, responsibility, and public image), with Capricorn style (structure, ambition, responsibility, and long construction); Neptune in Libra in House 6 brings imagination, image, popularity, collective moods, and inspiration into House 6 (daily work, technique, and bodily discipline), with Libra style (relationship, balance, negotiation, and sense of form).
Concrete friction: this aspect creates tension between action, the wish to act, image, vagueness, ideal, and scattered energy. Visible angle: Mars near the Midheaven (orb 2.3°) and Neptune near the Descendant (orb 2.8°) touch angles; this aspect is easier to notice through social role, reputation, career, and public image; also through direct relationships, partners, opponents, and the way others are met. House 10 (vocation, status, responsibility, and public image) 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.