Moon square Mars (orb 1.4°) 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 Cancer in House 7 brings personal dream, play, inner child, childhood imprint, mother figure, mother image, optimism, and inner rhythm into House 7 (relationship, confrontation, and the mirror of others), with Cancer style (memory, protection, belonging, and family sensitivity); Mars in Aries in House 3 brings action, courage, competition, and effort into House 3 (speech, learning, and the close environment), with Aries style (initiative, speed, confrontation, and direct action).
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 7 (relationship, confrontation, and the mirror of others) is in friction with House 3 (speech, learning, and the close environment); this can create blockage, inhibition, overreaction, or repeated conflict between the two fields.