uptight personality

Translations
напряжённая личность
Her uptight personality makes it hard for her to relax.
Её напряжённая личность мешает ей расслабиться.
Definitions
An uptight personality refers to an individual who is overly tense, anxious, or rigid in their behavior and attitudes. Such a person may exhibit a lack of flexibility, often feeling stressed or worried about various situations, and may have difficulty relaxing or going with the flow.
Words
personality

noun
личность
uptight

adjective
напряжённый