Learn English – Hard on the outside but soft on the inside (personality attribute)

idiomsmetaphors

What is a single word (or idiom, or metaphor) that can be used to describe a person's personality that is "hard" or "tough" on the outside, but sensitive and soft on the inside?

Something that says: "He might be hard to get along with at first, but once you get to know him more, you'll find he's really a kind and sensitive/empatic person."

Best Answer

From The Conversationist, Introvert or extrovert, normal or abnormal: the problem with personality types, by Nick Haslam (Professor of Psychology, University of Melbourne), July 30, 2014:

Muhammad Ali proposed a fruit and nut-based typology, classifying people as pomegranates (hard on the outside and inside), walnuts (hard on the outside, soft on the inside), prunes (soft outside, hard inside) and grapes (soft inside and out).

Another food metaphor would be prickly pear, which is tough and thorny on the outside but soft and sweet on the inside.

Related would be this variation of a well known metaphor: a sheep in wolf's clothing, obviously meaning looks frightening, but is a lamb inside.

Another related would be all bark and no bite, which can be used in a positive way, as in, for example, "Don't be afraid of your grandpa, he's all bark and no bite".