|Umbra Nova Owen|
|Full name||Delphinus Lux Nigra Black|
|Romaji||Derufinasu Rakkusu Nigura Burakku|
|Hair color|| White |
|Eye color|| Yellow |
|Alias|| Carl Lloyd Oak |
Umbra Nova Owen
|Partner|| Delia Alain |
|Siblings|| Emorias Black |
|Children|| Daniela Oak |
|Appearances|| The Ultimate Existence |
Delphinus Lux Nigra Black (デルフィナス・ラックス・ニグラ・ブラック Derufinasu Rakkusu Nigura Burakku?), most commonly known as Umbra Nova Owen (ウンブラ・ノヴァ・オーウェン Unbura Nova Ōuen?), is the main protagonist of The Ultimate Existence. He is the second-in-seat to the Unknown throne. He is the leader of the Infinity. He is the son of the Unknown Leader and the brother of Emorias Alba Malus Black.
Owen is a very determined individual who strives hard to obtain his goal of universal peace. He is very stern and serious and has a dry sense of humor. He has a very strong sense of justice. He cares very deeply for his Infinity and he cared very much for his family. He expresses a deep hatred for Emorias and Ins'Del.
Umbra is a Latin word meaning "shadow". Nova is a Latin word meaning "new". Owen is a name of Welsh origin that means "noble-born".
Delphinus is the name of a constellation and is Latin for "dolphin". Lux is a Latin word meaning "light". Nigra is a Latin word meaning "black".
- Despite being associated with the Light, Owen shows rather Dark-seeming displays, such as wearing black armor, looking very grim and sinister, and appearing and disappearing in black mist when teleporting. He also possesses the power of the Black Bell.
- His alias, Umbra Nova Owen, is based on the alias of the character known as U.N. Owen from Agatha Christie's And Then There Were None.
- His first name being the name of a constellation and his last name being Black is a homage to the naming traditions of the House of Black from Harry Potter.
- Owen's theme song chosen by L. Anthem is The Planets, Op. 32 – "Jupiter, the Bringer of Jollity" composed by Gustav Holst.