Fire:
Attacker
Skill: Light to Healing (not same skill as Pierdra though)
Leader: Attackers ATK and RCV slightly increased, 3x atk when matching firefire or firewater

Water:
Healer
Skill: All drops to Water, Wood, Light, Dark (PERFECT U&Y SUB HERE)
Leader: Healer HP and ATK slightly increased, 3x atk when matching waterwater or waterlight

Wood:
Devil
Skill: Randomly spawn 3 each wood and dark orbs
Leader: Devil HP and ATK slightly increased, 3x atk when matching woodwood or wooddark

Light:
Attacker
Skill: Randomly spawn 4 light orbs
Leader: Attacker HP and ATK slightly increased, 3x atk when matching lightlight or lightfire

Dark:
Devil
Skill: All drops to Fire, Water, Wood, Dark (PERFECT DURGA SUB HERE)
Leader: Devil ATK and RCV slightly increased, 3x atk when matching darkdark or darkwater

slightly increased means 1.2x