Pluto square Lilith (orb 1.6°) creates concrete friction between the two planets. The orb is very tight; this describes a stable character pattern more than a passing reaction.
Here, Pluto in Scorpio in House 9 brings crisis, power, survival, and regeneration into House 9 (vision, belief, study, and wider horizons), with Scorpio style (intensity, desire, crisis, secrecy, and invisible power); Lilith in Leo in House 7 brings pure ideal, absolute demand, fascination, and refusal of compromise into House 7 (relationship, confrontation, and the mirror of others), with Leo style (presence, pride, creation, and the wish to be seen).
Concrete friction: this aspect creates friction between Lilith (pure ideal, absolute demand, fascination, and refusal of compromise) and Pluto's crisis instinct: pressure can become domination, fear, or destructive escalation unless it receives a clear outlet. Visible angle: Lilith near the Descendant (orb 2.7°) touches an angle; this aspect is easier to notice through direct relationships, partners, opponents, and the way others are met. House 9 (vision, belief, study, and wider horizons) 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.