At the start of Beast Signer, one must create a character. His/her element is determined by a questionnaire at the beginning of the game.
The player is a survivor of the nuclear war that decimated Theanos. His/her parents were killed in the war, so he lives on his/her own in a remnant camp. The player regularly meets with three friends, named Andarion, Laurea, and Persivan. Together they aspire to be Signers and succeed together.