D.Va by pythagos

Level 1
[ul]
[li]Fusion Reaction - Damaging enemy Heroes with Fusion Cannon reduces its cooldown by 0.5 seconds.[/li]

[li]Time Out! - Hitting an enemy Hero with Mech Bash restores 50 mana.[/li]

[li]Neosteel Regeneration - Collecting a regeneration globe permanently reduces the cooldown of Pilot Mech by 0.75 seconds.[/li]

[/ul]
Level 4