Rarely , Banai also appear in Khandoba 's chief legend where he slay the demons Mani and Malla . Mhalsa and Banai ( or Ganga ) futilely help Khandoba in the battle to collect the blood of Mani , every drop of which was creating a new demon . Finally , the dog of Khandoba swallow all the blood . Rarely , Banai is described as seated behind Khandoba on the horse and fighting with a sword or spear , a role generally assigned to Mhalsa .