Non-Crossovers that Should Be, or Plotbunnies Free to Good Home

[Sirrocco]

Harry Potter's own soul, recovering something like a normal equilibrium, returns to its proper place - but with the fragment of Voldemort's soul already in residence, there is not, quite, enough room.

It settles in anyway, but due to the lack of space, cannot quite fit entirely back within Harry's body.

As a consequence, Harry will go through life with his soul extending just slightly beyond his body, and somewhat less securely attached than is usual.

What effects this may have on him, on his magic, and/or on those around him is undetermined; the answer to that question is left as an exercise for the reader. (Or, as the case may be, the author.)

Sounds like a Potter/Dead Inside crossover, really.