creature of habit
US /ˈkriː.tʃər əv ˈhæb.ɪt/
UK /ˈkriː.tʃər əv ˈhæb.ɪt/

1.
习惯性的人, 墨守成规的人
a person who likes to do the same things at the same time every day, or who always does things in the same way
:
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My grandfather is a creature of habit; he always has breakfast at 7 AM sharp.
我爷爷是个习惯性的人;他总是准时在早上7点吃早餐。
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It's hard for a creature of habit like me to try new things.
像我这样习惯性的人很难尝试新事物。