Stephen Kwabena Siaw aka Ayesem is a Ghanaian musician. He is mainly popular for his hit single "Koti". He is signed to Shocks Entertainment.

He was born on 1 April 1986 and raised in Takoradi, in the Western Region of Ghana, and the second of two children. He attended the Ghana Secondary Technical School for his senior high school education and then obtained a Higher National Diploma in Purchasing and Supply from the Takoradi Polytechnic in 2013.

He started off as a member of a group called Trinity in 2006. Together with Nero X, he formed a group called the 2Unit. They became very popular in the Western and Central Regions of Ghana.

Some of the artists he has featured and collaborated with include; Kofi Kinaata, Castro, Singlet, Kurl Songx, Epixode, and, Old Solja.

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