The troublemaker in a team is someone who asks difficult questions and pushes people to take risks. A synonym for troublemaker is challenger.

What do you think of this interpretation? Do you have anything to add? Do you know other synonyms/antonyms? Do you know sentences in which the word “troublemaker” can be used?
Thanks for your help!

See a translation

“Having a troublemaker on our team makes the team less positive, efficient, and stable. Our troublemaker is a real problem-child.”

The trouble with your example is that a troublemaker is not usually the same as a challenger, so it really doesn’t fit.

And in my example there could be many other choices for what causes a problem for a team.

Troublemaker is an all-purpose generalization for someone who makes things difficult. That’s why it is such a useful word.

But the kind of difficulty your sentence mentions is not actually trouble from a troublemaker. A challenger is a catalyst for change and improvement. I do not associate that with being a troublemaker.

A troublemaker could be an inciter, an agitator, a rabble rouser, a bully, a hellion, or a nuisance, etc, depending on what type of trouble they are causing.