Armin definitely was more of the 'don't kiss and tell' sort of person. Especially when it came to Jean telling him who he may or may not have kissed (or more). Double especially if Armin may actually know said people. Theoretically.

Instead, Armin sank into the water a bit deeper. The worst of his flush had abated, but there was still some clinging stubbornly to his cheeks. "I don't think Angel is interested in that sort of thing though."