[Ultragunner]

"limiter" can be understood in many ways

Spoiler for spoiler:

1st. it can be the "seal" that utilizing half of Miyuki's power to seal off half of Tatsuya's (by Maya's order), although this can be lifted by Miyuki (she did it in vol 7) or Tatsuya himself (he later learns how to do it)

2nd. the "limiter" can be something else, we are not that clear yet, even Kazama himself has said that Tatsuya has several limiters on him