A character with this personality trait is often jealous of others.

Jealousy is an emotion, and the word typically refers to the negative thoughts and feelings of insecurity, fear, and anxiety over an anticipated loss of something of great personal value, particularly in reference to an existing connection. Jealousy often consists of a combination of emotions such as anger, resentment, inadequacy, helplessness and disgust.

Though jealous is used synonymously with Envious in modern English, the two words are different.