Blademaster Robin is a Gold rarity Agility-class Hero and directly obtainable from the store's Hero chest.
Default Stats (Unequipped)
Threat--1757 Health--825 Damage--171
Passive--Perfect Son--Robin's counter never goes below 3 (upgradeable to 7)
Sword Dance (3 power, 171 damage)
Vengeance (4 power, 256 damage, 10% stun chance)
Love and Respect (7 power, 513 damage)