NA Localization:
An endearing yet frightful and mysterious octopus.
In truth, it is the great ukiyo-e painter who influenced many artists around the world.
The reason he turned out like that was due to some power from beyond space he encountered in his pursuit to become the "true artist." Or perhaps it was something else...
Either way, if it means that he could reach the truth, changing into this form is probably a mere triviality.
Fan Translation:
A lovely but also very strange octopus.
However, its true character is,
The magnificent Ukiyo-e artist of great influence within the artists scene.
The reason he ended up in this form is because of his obsessive pursuit to become a "true artist", and was unexpectedly influenced by the other side of the relative universe or something,
How awful...
In any case, if you really press him about it, as far as he's concerned, they might have just been some trivial things.