Answer: Openness
Explanation:
Openness is one of the OCEAN traits, the others being conscientiousness, extroversion, Agreeableness and Neuroticism.
A person that demonstrates the openness trait is eager to learn and innovate, this trait is known as the creative trait and people who score low in the pointers to this trait may find abstract thinking difficult.
Alex for being meticulous displays the conscientious trait, the people who display this are detailed and measured.
Isabelle displays the Agreeableness trait by being sociable and cooperative.