What it looks at
How each person tends to think, respond, initiate, organise, soften, challenge, withdraw, or open up in this relationship. Big-Five-style patterns — openness, conscientiousness, extraversion, agreeableness, emotional volatility — read inside the exchange, not as abstract traits.
Why it matters
Personality is not just a private trait. It shapes the emotional climate of the relationship — what feels welcomed, what gets met, what gets shut down.
What it can reveal
Whether someone tends to bring curiosity, structure, warmth, reactivity, caution, intensity, flexibility, or avoidance into the relationship.