Odin?

I hold everything
Beauty, magic, power, blessings
In Norse mythology, Odin is the god of many things.

I slip, I fall
All is released
Like rose petals scattered in the wind
At the end

As far as I remember, though my memory is vague, the animation for Odin's "Steel Bladed Sword" attack featured rose petals. "All is released" and "At the end" refer to death, which is what the attack causes.
"I slip, I fall"... Not sure about this, but in mythology, Odin's horse was named Sleipnir, which in Old Norse means literally "slippy" or "the slipper" (as in one who slips, not as in something you wear on your foot). "I fall" could be a reference to his other attack, "Gunge Lance".

So my guess is Odin.