Nocturn Tennyson

Prince Nocturn "Bernard" Tennyson-Baywad is the son of Ben Tennyson and Nebula Tennyson. He is the founder of the Osmo Band, Prince of the Null Void and was praised along with Eren and Linda as "Earth's Mightiest Heroes" by the Seedrians. He was named Nocturn by his mother and surnamed "Bernard" by his father.

Appearance
Nocturn was biologically born as a mixture of regular To'kustar and Mutant To'kustar. He resembled as a baby version of Way Big with some traits of Nebula, such as hint of grey on his skin, had purple pattern in place of red, axe-arm blades, spiked bands on his arms and legs, and sharp teeth; as well as having emerald-green eyes. The only unique traits that separate from his mother and father was having two head fins.

After seeing his parents turning into their human forms, he cheerfully transformed himself into a human version of him. In his human form, he looks exactly like Ben with raven-black hair with blue hue and red eyes similar as Nebula and Albedo.

Due of the To'kustar's rapid aging process, Nocturn aged by 5 each year.

At age 5, Nocturn's Human form resembled Ben when he was aged 5 (minus missing tooth) and wore common clothes, yet when he transformed into any Fusion Aliens, he gain similar uniforms as Ben's aliens. When as a To'kustar, he grew up at the size of the full-size Vaxasaurian.

At age 10, he resembled 10-year-old Ben and, in Acception, he wore red T-shirt, black hoodie jacket with green stripes and a Omnitrix symbol on his left chest, wore blue pants and a pair of sneakers. In his true form, he's around the same height as 11-year-old Way Big.

At age 15 and onward, Nocturn's human form looks exactly like Ben at age 15-17 but has a change of attires: he now wore a jacket similar as Ben from AF/UA with same designs as his hoodie, his hair grew longer and wore black pants with blue geometrical patterns. As for his true form, he had grown to the maximum height of a regular To'kustar.

Personality
Nocturn was innocent and cheerful when he was age 5-10 but was show to be very matured as he always argued with his mother about being the new King of Voidtropolis and declining his dreams of becoming a rock star. He even mocked and scold some characters such as Inspector 13 and the bodyguard that guards the theater for Gwen 10 & Ben 14 Live!.

When aged 15 and onward, Nocturn behave exactly like his father but had strong care for his people, had greater sense of responsibility (as it shown when he didn't want to damage the DX Mark 12 by going faster) and always wanted to stay out of trouble, hence his desperation of getting out of the non-alien local country before it gets worse. He was shown to be following his father's footstep, such as helping those in need, taming Kathrine's pain by making out and defend the people he cares about.

He has also inherited the Tennyson Rages, as Rook Prime calls it, where at certain point, Nocturn will become very agrressive and violent. However, this could be just his Mutant To'kustar side.

Powers And Abilities
Because of being a mixed breed of two To'kustar, Nocturn, according to Ben, is powerful enough to outmatch an Ultim To'kustar and even fought Ultimate Aggregor to a standstill at age 5.

Nocturn was capable of shifting between human and To'kustar at will, stated by Nebula that he inherited Ben's ability to switch between Human and Anodite.

Being born as the Adapter Osmosian, Nocturne has the ability to construct DNA Weapons very similar as his father does after absorbing the PokeDigi and can even fuse two DNAs to become a Fusion Alien.