His quiet 'demeanor' [='manner, bearing'] had a calming effect on us.
They maintained a solemn 'demeanor' as they told us the bad news.
She has a shy/friendly/warm 'demeanor'.
(..) ...by wearing slightly masculine clothing... ...being more aggressive than her female colleagues... ...which gives her a somewhat prickly demeanor... ...and ironically enough, makes it less likely for her to be accepted... ...and promoted by her male superiors... ...who mistake her insecurities (..)2006 Casino Royale