The Bosses in Seraphic Gate have the following health and damage under the Normal difficulty setting.

Ethereal Queen (Girl with six wings): HP 2,400,000; Element : Green 100, Red 100, Brown 100, Yellow 100, Black 100. The magic balls have about 60,000 HP.
Gabriel Celeste (Boy with six wings): HP 1,045,000; Element : Green 100, Red 100, Brown 100, Yellow 100, Black 100. The magic balls had about HP 14,000.
Grymon (Knight): HP 500,000; Element : Green 100, Red 100, Brown 100, Yellow 100, Black 100. The magic balls have about 22,000 HP.
Leonid (Dark knight): HP 1,800,000; Element : Green 100, Red 100, Brown 100, Yellow 100, Black 50.
Leviathan (Squid): HP 417,000; Element : Green 100, Red 100, Brown 250, Yellow 100, Black -50.
Peluda (Fire beast): HP 400,000; Element : Green 100, Red -50, Brown 100, Yellow 100, Black 250.
Rib Farager (Reaper): HP 400,000; Element : Green 100, Red 250, Brown 100, Yellow 50, Black 100.
Seaspawn (Turtle): HP 500,000; Element : Green 100, Red 100, Brown 250, Yellow 100, Black -50.
Vembert (Red Gigas): HP 268,000; Element : Unknown
Wyvern (Dragon): HP 534,000; Element : Green 100, Red -50, Brown 100, Yellow 100, Black 250.