Here are some of the words, not all, that they used to describe this from their experiences: Angry, , apprehensive, combative, complainer, contrarian, critical, , demanding, difficult, distrustful, disturbed, eccentric, fanatic, fearful, fixated, fussy, guarded, hardheaded, inhospitable, intense, irrational, know-it-all, menacing, mentally-rigid, moralistic, obsessed, odd, offensive, opinionated, sensitive, peculiar, pedantic, quarrelsome, questioning, rigid, scary, strict, stubborn, suspicious, tense, threatening, tightly-wound, touchy, unforgiving, unhappy, vindictive, wary, watchful, withdrawn.
Nicolas was left alone in the parlor, frowning while leaning against the sofa.
I stood behind Lance, and when he felt someone standing behind him, he turned.