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It actually looks to me like a spike that's bent over with the tip still caught in the plant. These can be a pain because sometimes the tip won't free it's self and it's almost certain to break it if you try and pull it out.
I would let it grow a bit bigger to be sure, if it develops as a loop with both ends in the plant then that's what it is. Last time I had one like this I slit the leaf it was growing at the base off to remove that leaf and free the spike. The plant was healthy so could spare the leaf. I wouldn't do that until you know for sure though.
It doesn't look like a root to me, you usually see a bit which is silvery on roots and before that point the green tip would be quite rounded. A spike growing correctly would be a mitten shape. It doesn't quite look like a keiki to me either.