User blog comment:B214/Volume 23 discussion blog/@comment-5480911-20170213225853/@comment-1359322-20170217050401

No it's a subspecies.

"The aura which was wrapped around her had become an armour. —[Twilight Saint Affection], Asia’s subspecies Balance Breaker."

- Volume 21

"Asia's balance breaker was created due to Fafnir's influence and because Fafnir is not part Twilight Healing, he is an external factor making it an irregular."

Correction: Asia's Balance Breaker wasn't created due to Fafnir, it was created by Asia and has Fafnir's aura added to it.

"Asia’s Balance Breaker; for a certain amount of time, and in certain areas, it expands an extraordinary healing field, and is an ability which can completely nullify any injuries. Rather than dispelling Rizevim’s attacks, it could be said that they couldn’t penetrate Asia’s healing field at all. That’s why it looks as though his attacks were cancelled by the barrier. Fafnir’s dragon aura was also added on. It is supposed to have high defensive strength, so it became a barrier which could block attacks."

- Volume 20 Afterword

Fafnir himself wasn't a true factor like the Evil Piece is to Ise or the Light Container is to Yuuto. In their cases, without the Evil Piece or Light Container inside their body, the BB's won't be attainable. Asia, on the other hand, can still enter her BB even without Fafnir by her side hence a subspecies.