Kurotsuchi is generally calm and easy-going. She has displayed a powerful loyalty to her village, as she was more interested in killing the jinchūriki of the Eight-Tails and Nine-Tails than actually protecting them. She decided this was the best plan so Iwa could become stronger than Konoha and Kumo.
Like her grandfather, she is very audacious. She often sarcastically implies that because the Tsuchikage suffers from things like back pain he should be replaced by someone younger. She also has a immature side to her, which she hides, as seen when she reprimands Akatsuchi on his childish excitement about flying when they were heading towards the Island Turtle, though she was secretly excited about the prospect as well.
Kurotsuchi also has the utmost confidence in her skills, as seen when battling and capturing Kabuto, which makes her slightly arrogant of her abilities.