The yoni felt tired of birthing the yoniverse and dreams about painting the world she has allready set in motion
From this feeling she would produce this creature called Nebula. Similar to yonians with a body of yello its eyes deep like yalaxies.
Translucid in its being and forever curious about its excistence it is not like other yonians and if it stays to long in the material form it painfully turns into stone
When the stone cracks its energy is set free once again and it is immortal
It travels the world searching for meaning and changing reality with its paints
Motivated by purpose and jealous of mortality it often hangs around beings of the yalaxy embarking on their quests. Like with games, nebula can get bored of the mortals and skip. Hopefully not when they are stuck in a pit of yorms.