User blog comment:B214/Question and Answers 2/@comment-82.178.74.96-20140201113221/@comment-16281343-20140201132810

Having a dragon-type Sacred Gear doesn't mean that the Balance Breaker will be an armor.

~Juggernaut Drive is exclusive to BG and DD. Breakdown the Beast is the term used for other beings sealed inside a SG.

~I don't think Saji can enter BtB since Vritra isn't completely sealed inside one Sacred Gear. There are still other Vritra SG that may hold a part of his soul.