Sun square Pluto (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, Sun in Aries in House 8 brings identity, ego, father figure, visibility, and direction into House 8 (sexuality, shared power, crisis, and invisible bonds), with Aries style (initiative, speed, confrontation, and direct action); Pluto in Cancer in House 11 brings crisis, power, survival, and regeneration into House 11 (networks, audience, groups, ideas, ideologies, political beliefs, and collective projects), with Cancer style (memory, protection, belonging, and family sensitivity).
Concrete friction: this aspect creates tension between identity, father image, power, and control: recognition can feel like a field of crisis or domination. House 8 (sexuality, shared power, crisis, and invisible bonds) is in friction with House 11 (networks, audience, groups, ideas, ideologies, political beliefs, and collective projects); this can create blockage, inhibition, overreaction, or repeated conflict between the two fields.