Every weapon in Fire Emblem Heroes falls under a distinct weapon type. Currently there are 24 weapon types in the game, which are further split into red, blue, green, and colorless weapons.

•  Red weapons
  • Sword, Red bow, Red Dagger, Red Tome, Red Breath, Red Beast weapons have a weapon-triangle advantage against green weapons and triangle disadvantage to blue weapons.
•  Blue weapons
  • Lance, Blue bow, Blue Dagger, Blue Tome, Blue Breath, Blue Beast weapons have a triangle advantage against red weapons and triangle disadvantage to green weapons.
•  Green weapons
  • Axe, Green bow, Green Dagger, Green Tome, Green Breath, Green Beast weapons have a triangle advantage against blue weapons and triangle disadvantage to red weapons.
•  Colorless weapons
  • Colorless bow, Colorless Dagger, Colorless Tome, Staff, Colorless Breath, Colorless Beast weapons are not affected by the weapon-triangle by default.