Eiro looked at the woman right next to him, Evelyn James the Bloodstone Sorceress. Until now, whenever he heard of any person or group making something to directly influence or experiment with cards, it was the same organization behind it. And Eiro was sure that it wasn't some sort of coincidence, Evelyn was most likely part of the same organization.
But as he still couldn't be entirely sure how strong she was, Eiro couldn't just 'challenge' her. Enka was incredibly strong, far stronger than Eiro was at the time he fought him. But even Enka just had a replica, a 'fake' card item. The feeling that Evelyn gave off was indisputable, however. She was the actual owner of a card.
It may just have to do with internal diplomacy, but it would make sense for Evelyn to be insurmountably strong compared to Enka. And Eiro wasn't that much stronger right now than Enka was. He didn't want to risk anything.