miscreant
/ˈmɪskriənt/Definitions
1. noun
A person who behaves in a disobedient or disloyal way, especially one who breaks the law or is involved in criminal activity.
“The police were searching for the miscreant who had stolen money from the local store.”
2. noun
A person who is considered to be a troublemaker or a nuisance.
“The teacher had to deal with a miscreant student who kept disrupting the class.”