(someone's) sparing nature

Translations
бережливый характер (кого-то)
Her sparing nature made her an excellent choice for the role of financial manager.
Её бережливый характер сделал её отличным выбором на роль финансового менеджера.
Definitions
A person's tendency to use resources, such as money, time, or words, very carefully and only when necessary; being economical, frugal, or restrained in giving or spending.