Board Thread:Chapter Discourse/@comment-43813832-20191030190334/@comment-36009152-20191110235940

Maybe it's meant that Krul is Guren's ally in that as a messenger of Mahiru their goals are in line with one anothers. People don't necessarily have to be friendly with one another to be allies together, but working together helps both their plans. If and when Krul arrives in Shibuya she won't be displeased that Guren is dealing with the first, and then perhaps that's her cue for her plans to take effect.

We are shown other vampire behaviour and Krul does show care to Mika, and sees him as more than an asset. She may value Yu as another seraph, more so since he is the key to getting her brother back.