Ganesh

Ganesh is the elephant-headed Hindu god worshiped as the remover of obstacles and the god of luck and new beginnings.

History
While Shiva was away, Parvati made Ganesh out of clay. As she was getting their home ready for Shiva's return, she tells Ganesh not to let anyone through the door. When Shiva returns, he doesn't know who Ganesh is. But Ganesh refused to let his father into his own home, this responded in Shiva lopping of Ganesh's head. To avoid a big fight with Parvati, Shiva sticks an elephant's head on Ganesh.

Aru Shah and the End of Time
To be added

Trivia

 * His vahana (divine vehicle) is a mouse.