The idol is correlated with Krishna after killing the Kamsa, very exhausted and hungry. The Thiruvarppu temple also has a drum which is made out of bell metal. It is believed that Lord Krishna announced to kill the Kamsa on this drum.

The Thiruvarppu Temple is peculiar in its rituals from other Hindu temples in the southern part of India. Unlike other Hindu temples in the south, Deeparadhana, worship with lamps, is done after the Athazha pooja. Also, when all the other temples are closed during the eclipse time, the Thiruvarppu temple remains open.