Robin

Hero Specialty: Forest Bandit
Physical attacks on enemies have a chance of Critical Hit, and dealing bonus damage equal to their critical bonus. Hero and troops critical damage is increased by 30%(+).

Stats
Robin begins with a high strength stat and +5 luck.

Default Spells
Entangle, Giant Hit, Bless, Forest Guardian, Mass Revive, Extinction Slash

In-Game Hero Strategy
Robin's specialty provides high benefits for troops with high luck. Physical damage spells are recommended to improve damage as his strength growth is good

This means a focus on strength and luck will be very beneficial. Physical spells will deal high damage with the high strength. The luck combined with the increased critical damage results in in massive damage from critical hits which occurs frequently from the luck.