Katsura has an uncanny ability to pop up when Kida least expects it. Or maybe she's just that good at sneaking around. I don't think it was a coincidence she was there just as he was muttering to himself.
Last chapter it was a Two-side up, this time it's a Pon de Ring.
This manga naming these hairstyles of hers is actually helpful to me, I usually make personal notes about characters and describe their hairstyles in it so I can remember who is who after months of not reading something.