There are different types of Heroes who can help you on your way.

Melee: Close combat type, the only one who can get out of a struggle by themselves. Symbol: Katana-shaped sword

Pistol: Ranged attack with good fire rate and accuracy. Hits a single target at a time. Symbol: Pistol

Shotgun: Ranged attack with spreading shot, stunning targets in close proximity to the main-target. The main-target receives full damage of the weapon. Symbol: Shotgun

SMG: Ranged attack that shoots in short bursts. Main-target is hit with damage equal to the power level, but the remaining bullets from the burst are weaker. Those remaining bullets also stun the targets for very short time. Symbol:  Hefty gun

Assault rifle: Ranged attack that shoots in longer bursts than SMGs. Main-target is hit with most damage, but the remaining bullets from the burst are weaker. Those remaining bullets also push back the affected targets. Symbol: Thin gun

Sniper rifle: Ranged attack with a zoom that allows you to hit with pinpoint accuracy. Symbol: Thin gun with a scope