Onmur
Archangel of Nutella.
The problem with giving Jyuubey a Clear Seed is that, due to him most likely carryng Grief Seeds (or getting them later from the Pleiades if we don't put a stop to that), the Clear Seed won't actually do anything, because Grief Seeds steal Grief from Seeds that have been Cleaned out.
So: Jyuubey absorbs Grief into Clear Seed. Grief Seeds absorb Grief from Clear Seed. Grief Seeds Witch out.
Maybe we can ask the Pleiades to keep the Grief Seeds in the freezer for future de-Witching, but we're still left with the problem of telling Jyuubey he sucks at his main job.