there's at least 2 reasons why I merges my favorite crossover ensemble of Sora, Riku, Kairi, Donald, and Goofy (Kingdom Hearts); Ash, Misty, Tracey, and Melody (Pokemon); Taichi, Yamato, Sora, Mimi, Koshiro, Joe, Takeru, and Hikari (Digimon); and Robin, Starfire, Beast Boy, and Raven (Teen Titans 2003) with one that consists Recca, Domon, Fuko, Mikagami, Koganei, Isami, Toshi, and Soshi from Flame of Recca and Soar High! isami respectively:

• to add another characters that closer to Robin in terms of unpowered Baseline Humans(at least when assuming Digimon and Pokemon casts here are powered-up), even when those people are still Colloquially metahuman from use of magical weaponry
• to address Recca, Domon, Fuko, Mikagami, Koganei, Isami, Toshi, and Soshi's lack of healers