Hohoho, hello there readers, here will be the list of Original Characters, because as you can tell there are a lot of them, but what am I meant to do? Its One Piece after all so its either I follow plot or make him a marine or I have to stay inventing characters, so to make things easier for you I shall be making this auxiliary chapter with their names and descriptions. (thank you Timothy_Gultom for the suggestion)
This will also contain minor spoilers so do be warned
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Archelaus Tigra, Arch - Protagonist of the novel, Looks: white hair, azure eyes, 1.8 meters tall, athletic physique. Occupation: King of Tigria. Age: 16 years old at the beginning of the novel. Introduction: Chapter 1.
Apollo Tigra - Looks: 2.3 meters tall gruff looking man with long black hair and a neat beard, he has a bulky muscular physique. Occupation: General of Tigria. Age: 23 years old. Introduction: Chapter 1.
Aristophanes Tigra, 4th - Looks: 1.3 meters tall, he was a small child with a head of brown hair, and brown eyes. Occupation: Minister of Internal Affairs' Protege. Age: 9 years old. Introduction: Chapter 1.
Andronicus Tigra - Looks: an older looking Apollo, with some greying hairs, 2.6 meters tall. Occupation: Former King of Tigria. Age: 60 years old. Introduction: Chapter 1.
Alonso - Looks: 1.77 meters tall, parted blonde hair, brown eyes. Occupation: King's butler. Age: 24 years old. Introduction: Chapter 3.
George Ward - Looks: 1.9 meters tall, buzz cut black hair which is considerably gray and black eyes, muscular bulky physique. Occupation: Military Advisor. Age: 64. Introduction: Chapter 3.
Ade Wilhelm - Looks: 1.72 meters tall, bald with a long gray beard, wrinkled face, green eyes, thin weak build. Occupation :Minister of Internal Affairs. Age: 67. Introduction: Chapter 3.
William Ryder - Looks: 1.85 meters tall, long brown hair (not shoulder length but almost), yellow eyes, compact muscular physique. Occupation: Expedition Commander. Age: 33. Introduction: Chapter 3.
Achilles Tigra - Looks: 1.1 meters tall, messy red hair with eyes blue like the sea. Occupation: None. Age: 5. Introduction: Chapter 4.
Arthur Tigra - Unknown
Bertram - Looks: 1.87 meters tall, brown hair with beady eyes, an overweight man. Occupation: Expedition Team Navigator. Age: 31. Introduction: Chapter 5.
Curt - Looks: 1.83 meters tall, messy blonde hair with murky brown eyes, thin build. Occupation: Expedition Team Cook. Age: 29. Introduction: Chapter 5.
Cort - Looks: Identical to Curt. Occupation: Expedition Team Shipwright. Age: 29. Introduction: Chapter 5.
Ugo - Looks: 1.78 meters tall, neat green hair and emerald eyes, thin build. Occupation: Expedition Team Doctor. Age: 19. Introduction: Chapter 5.
Vidar L. Picker - Looks: 1.95 meters tall, bald with brown eyes, scarred face and body, bulky muscular physique. Occupation: Boss of Lawless. Age: 44. Introduction: Chapter 6.
Kaf Ward - Looks: 1.87 meters tall, wavy brown hair and red eyes, athletic physique. Occupation: Battalion Commander. Age: 20. Introduction: Chapter 20
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So that's it for now, I hope this is helpful, I might attach images to the more important characters but I hope this helps for now.