This study aims to determine the important role of the Guidance and Counseling teacher in the development of student character. Character is developed through stages of knowledge (knowing), implementation, and habits. Character is not limited to knowledge. Someone who has knowledge about goodness is not necessarily able to act in accordance with his knowledge, if not trained (become a habit) to do good. Character also reaches into the area of emotions and personal habits. This is needed so that students and / or other school members involved in the education system can simultaneously understand, feel, respect, and practice virtue (moral) values. Counseling teachers here are really needed in terms of Guidance and Counseling that can guide students in developing better characters, so they can become human beings with character. In the signs of organizing guidance and counseling in the formal path it is explained that the guidance and counseling services provided by the guidance and counseling teacher are in the context of service area assignments aimed at developing social care, developing positive emotional aspects, guiding students in guiding life lessons through taking decisions, choosing, achieving, and maintaining achievement. Teacher Guidance and Counseling must facilitate the development and growth of student character. This article is useful to add insight to the students of the Guidance and Counseling study program so that it can be a reference in developing the character of students in high school effectively.