>>9122465Sana theorycrafting:
The most important thing about unbound Sana isn't her size, it's her mass. If Sana has a mass, it would easily explain why she destroys the Earth upon unbounding. Her gravitational field would instantly induce tidal forces which would rip the Earth apart. However, Sana having a mass results in some issues. How is she meant to watch over the universe and its contents, if anytime she gets close to anything it gets torn apart? Even if she doesn't get close, she would sling orbits completely out of whack anytime she did anything. Also, it would require enormous amount of ass-fuckery to prevent her body from gravitationally collapsing upon itself. Thus, I posit this theory:
Sana is a hologram (HOLOgram), a purely photonic being. This explains how she can observe astral objects from up close without causing undesired gravitational effects, this makes it easy for her to move around the universe at lightspeed (given she is light), it explains how her size can be varied while respecting conservation of energy, and finally it can match up with the destruction of the Earth observed: if she enters her unbound state while she is standing on the surface of the planet, the entire object will be instantly flooded with an astronomical flux of high-energy lightwaves, completely sterilizing the planet and vaporizing the surface.
Hell, this even means unbound Sana can sit on sizefags and Gura with no lethal consequences; instead of bearing trillions of tons you're only being squeezed by a reasonable amount of light pressure.
I rest my case, this is now my headcanon.
