見かけによらない
Meanings
1
does not match one's appearance; looks can be deceiving
Used to say that someone or something is different from what their appearance suggests. Often implies a positive surprise, e.g., a tough-looking person is actually kind. The related form 見かけによらず is also common.
See also: 見かけによらず
He is a kind person who doesn't match his appearance.
This dish is tastier than it looks.