Everyone was focused on their own battle not realizing the plan that Leo came up with. He knows that Eureka will always have a part of her heart where her family is the most important. If he could kill these two now then she'll start crumbling even more. If that happens then her abilities would errupt and wreck havoc all through out.
Just as he had planned, Akihuro and Haruka who are two busy in their fight didn't realize that they had stepped into the encirclement of Black's barrier ability. Taking this opportunity, black instantly activated his barrier, the same goes with Bronze who used her suction, taking their energies.
Akihiro and Haruka were both down for the gravity of suction was too much for them. Their energies are being drained so fast that their vision begun getting blurry.
