Blackcurrant

Blackcurrant the Grand Dark Spirit is the benevolent overseer of Arko in Magical Vacation. Its purpose in life is to observe Arko's stars, which are the reborn souls of dead magicians, as they peacefully ascend to a higher plane of existence in their new ethereal form.

Personality
Blackcurrant is incredibly enlightened and calm, and kindly guides those who find themselves lost in the vast darkness.

Appearance
As per its title of "Grand Dark Spirit", Blackcurrant stands at the pinnacle of all Dark Spirits. It has a purple squid-like body with four appendages, four orange eyes, and a pair of orange wings. Its mouth is located between its eyes and wings.

Backstory
Given its role as the observer of reincarnated souls, it can be assumed that Blackcurrant has been alive since the very conception of the universe, when it was nothing more than light and darkness. Additionally, it claims to be born from the light and is simultaneously the birth-giver of light.

Magical Vacation
In order to get their hands on a Dark Veil, the students of Will-o'-Wisp Academy disguise themselves with the Light Veil that was given to them in May Village. Wearing the Light Veil allows them to communicate with the stars scattered throughout Arko, and by making all of them ascend, Blackcurrant reveals itself in the cavern's deepest reaches. When talked to, Blackcurrant explains how the students are beings of light, while Enigmas are beings of darkness, and that light and darkness will become one in the end. There is no fight against Blackcurrant; instead, it grants the students with a Dark Veil, which lets them pass through Abyssal Corridor as mortals.

Quotes
"There is light in darkness, and there is darkness in light. Light and darkness shall become one in the end."

"It is I who gives birth to light. At the same time, I am born from the light."

Trivia

 * His name comes from 'blackcurrant', sweet edible berries used for jams and syrups.