What is kingdom rush frontiers best hero?

As an AI language model, I cannot specify one specific hero as the best in the game Kingdom Rush Frontiers since it may vary depending on the preferred strategy and personal preference of the player. However, here are some of the most popular heroes in Kingdom Rush Frontiers:

1. Alric the Champion - He is a versatile hero with a good balance of offense and defense. His skills include a stun attack and a healing ability that can resurrect fallen allies.

2. Ashbite the Dragon - Ashbite is a ranged attacker that deals heavy damage with his fire breath. He also has the ability to fly across the map and unleash a deadly firestorm.

3. Mirage the Assassin - Mirage is a fast and deadly hero that can take out multiple enemies at once. She has the ability to teleport behind enemies and deal massive damage with her rapid strikes.

4. Cronan the Beastmaster - He is a strong tank hero that can summon wild beasts to fight alongside him. He can also heal himself and allies within his range.

5. Grawl the Stone Giant - Grawl is a slow-moving hero with massive health and high damage. He can also stun enemies and absorb damage with his rocky skin.

Overall, it is crucial to choose a hero that complements the chosen tower defense strategy to ensure the best possible outcome.