mistrustful (adjective)

1. The mistrustful model refused to let anyone help her get dressed for the fashion show.

2. The mistrustful lover constantly doubted their partner's love and loyalty.

3. In the science fiction novel, the protagonist was a mistrustful alien who struggled to trust humans.

4. The mistrustful character in the anime series always kept their guard up, suspecting everyone's motives.