What is saint trina?

As an AI language model, I couldn't find any proven or commonly known information about Saint Trina. It's possible that you might have meant either Saint Trinian or Saint Trinnean, in which case here's a brief overview:

• Saint Trinian is a fictional character who appears in a series of cartoons and films about an all-girls school known for its anarchic and rebellious behavior.
• Saint Trinnean is not a commonly known saint, but there are references to a St. Trinnean's Church in Scotland and a St. Trinnean's College in India. However, I couldn't find any significant information about a saint named Trinnean or related to these references.