Mars square Neptune (orb 1.9°) 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 Aquarius in House 7 brings action, courage, competition, and effort into House 7 (relationship, confrontation, and the mirror of others), with Aquarius style (independence, networks, distance, and collective change); Neptune in Scorpio in House 4 brings imagination, image, popularity, collective moods, and inspiration into House 4 (roots, privacy, and inner foundation), with Scorpio style (intensity, desire, crisis, secrecy, and invisible power).
Concrete friction: this aspect creates tension between action, the wish to act, image, vagueness, ideal, and scattered energy. Visible angle: Mars near the Descendant (orb 3.5°) touches an angle; this aspect is easier to notice through direct relationships, partners, opponents, and the way others are met. House 7 (relationship, confrontation, and the mirror of others) is in friction with House 4 (roots, privacy, and inner foundation); this can create blockage, inhibition, overreaction, or repeated conflict between the two fields.