No. Every player competes individually. Coordinating Picks with other players, sharing accounts, or using automated tools isn't allowed and can get you removed from a Battle and disqualified from prizes.
Bankroll U can also void Picks accepted because of an error (such as wrong odds, or a game that had already started or ended) and adjust balances, even after they've settled.
You can only have one account. See Can I have multiple accounts?