She is a trustworthy friend who always keeps her promises.

Able to be relied on for honesty and integrity in relationships.
You can count on him; he is trustworthy.
It's important to have trustworthy people in your life.
They found a trustworthy babysitter for their children.
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She is a trustworthy friend.

Able to be relied on as honest or truthful.
You can count on him; he is trustworthy.
I need a trustworthy partner for this project.
Her trustworthy nature makes her a great leader.
trustworthy source
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reliable
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honest