Moon square Mars (orb 1.5°) creates concrete friction between the two planets. The orb is very tight; this describes a stable character pattern more than a passing reaction.
Here, Moon in Sagittarius in House 4 brings personal dream, play, inner child, childhood imprint, mother figure, mother image, optimism, and inner rhythm into House 4 (roots, privacy, and inner foundation), with Sagittarius style (expansion, travel, belief, and the search for meaning); Mars in Pisces in House 7 brings action, courage, competition, and effort into House 7 (relationship, confrontation, and the mirror of others), with Pisces style (imagination, faith, compassion, dream, and permeability).
Concrete friction: this aspect creates live tension between the inner child, mother image, and Mars: vulnerability, protection, or the need for safety can turn into anger, inhibition, or defense, sometimes through a weak, inhibiting, or castrating mother image. House 4 (roots, privacy, and inner foundation) is in friction with House 7 (relationship, confrontation, and the mirror of others); this can create blockage, inhibition, overreaction, or repeated conflict between the two fields.