Splendor Man is the Slender Man's brother.
Splendor Man is supposedly the Slender Man's older brother and, as opposed to his younger brother, loves everything happy and joyful. His purpose is to cheer up people who do good deeds. He is often portrayed as happy-go-lucky, and very kind, especially to children. He often brings people gifts such as flowers.
His personal relationship with his brother is unknown, as the two are only shown together in fan art, although many fans believe Slender Man does not approve of his older brother's cheerful nature, and that Splendor Man either does not understand his younger brother's behaviour or disapproves of his murderous behaviour.