[Kira fishes the nail clippers out of his pockets]

You know, there happens to be a subset of palmistry in which the nails are used. Massive growth of the crown in a short period of time indicates the opening of one's third eye, better connecting your intuition with the movement of fate. Which, if you believe....

[He then proffers them rather insistently in the middle of this uchikoshi appropriate psuedoscience monologue]

...makes the upkeep particularly important. I'm certain you can imagine why that would be.