Prepare for a friend to possibly act out of character or be critical.

准备一个朋友可能出于字符或者是至关重要的。

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Although it's unlikely a person will behave differently simply because of their hair colour, they may act out of character if they are being treated badly, or according to a stereotype.

尽管一个人不太可能仅仅因为发色就举止反常，但如果别人对他们不客气，或者抱有成见，他们有可能行为不当。

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They get trashed and act totally out of character, shouting and swearing.

他们酩酊大醉，行为异常，大喊大骂。

《柯林斯英汉双解大词典》

And you won't act out of character while you're hypnotised.

BBC: Hypnotherapy session

In "Act Like a Man, Think Like a Lady, " the single mother character is trying to date herself out of her parenthood predicament.

CNN: Single mothers, stand proud