Characters in the game can be broken up into three groups. Captains are the leaders of their team who also have the ability of Mega Strikes and Super Ability to change the tide of a game. Sidekicks are the other memebers of your team who make up the majority of the team, each of them have diffrent stats like captains and each species has their own Skillshot. The final type is the Goalie who is a Critter, in many ways the most needed member of the team who is the last line of defense between the other teams offense and your goal.
Both Captains and Sidekicks are a certain type of player with different stats, refer to the chart below for the stats for each type.