It is explained on page 11 of the 100th episode of the 80th issue of Sa Comics (Memory of Musical Notes). The following is the conversation:
Telka: Don’t you even have a name yet?
Little Devil: Name? No, this kind of thing is important?
Telka: Hmm...
Morning Star.
Little Devil: What?
Telka: Tub, the morning star, what does this name mean?
Little Devil: Okay, let’s call it this, I like it.
......
The origin of the name of the little devil (Morning Star Tubo): Telka was looking at the starry sky at that time, so he came up with the name "Morning Star", and "Tubo" The meaning of "excellence". It seems that Telka can really grow into an outstanding person.
Little Devil: Silver hair and red eyes, evil little shota. When the Demon King Crow forced out the demon blood from his body, the black (Natasha) and white (Agatha) twins collected the demon blood into a bottle. The two wanted to use the demon blood left by the previous crow to create a new demon king. The two sprinkled the devil's blood on the devil's box, and the box burst out with an unusually dazzling light. In the center of the violent explosion, a new devil with long dark purple hair appeared! This little devil is powerful and rebellious. In this way, the little devil was born!
Hope to adopt~~~