The hidden avatara of Kali-yuga (Sri Caitanya Mahaprabhu) appears as a devotee to fulfill two purposes. The first purpose is to spread nama-sankritana. Mahaprabhu: Maha means mahabhava (Radharani) and prabhu means Krsna. The Gaura avatara is the avatara of avataras. Sri Caitanya Mahaprabhu's last 12 years were spent in the mood of Radharani.
