Old - Okegom

Old has messy brown hair tied in a ponytail and a dorsal fin on his head, as well as brown eyes. He has three large scars on his face over each of his eyes, two on the right eye forming a cross and upon his left a thick, vertical scar. His brown tail is also badly scarred, covered in nicks and scratches. He wears a long black coat over his shoulders and under that he has a gray dress shirt and a black tie. His pants and boots are also black.

When he was young, Old had worn a fleece turtleneck button-up jacket that had white fur lining, his ponytail was short and reached just below his shoulders. Instead of three scars around his eyes he only had one, upon his right. He greatly resembled his son, Samekichi.

Much of Old's personality before the war between the sisters remains a mystery. In the past, he had a streak of cockiness, believing himself to be the better of Meikai's familiars, fit to wield the Sacred Sword. Upon discovering that the responsibility would be entrusted to Tatsumiya instead, he became irrevocably wounded.

Deeply begrudged that Tatsumiya was given the responsibility, Old would come to loathe her and Meikai, leading to him to betray the two. Upon encountering Tatsumiya again on the field of battle, Old attacked her with an intense rage for the slight upon his honor.

After being sealed with Mikotsuhime for long, Old no longer holds any affection for any — not for his former comrades, his sons, or for the man he previously called Master. The only thing that remains is his desire to avenge himself by harming Tatsumiya, for the scars and the humiliating defeat that she gave him, a grudge that has remained since before he was first sealed.

In the past, he was one of Meikai's familiars, alongside Tatsumiya. One day, Meikai was handed the Sacred Sword — a sword immensely important to the Blue Sea Kingdom — by The Sea King, ruler of the kingdom. The Sea King tasked Meikai with a difficult conundrum; he would have to decide between the two of his familiars which was worthy of wielding the legendary blade. Having believed that he would reign superior and be chosen to hold the blade, Old became indignant upon the revelation that, instead of him, Tatsumiya would be chosen as wielder instead.

Engulfed with rage and jealousy, Old would end up defecting to Mikotsuhime's side. He would later end up battling Tatsumiya, who would go on to leave him covered in his signature scars. Along with Mikotsuhime and other denizens of the Sea of Death, Old was sealed away by Meikai's sacrifice.

Old was once Meikai's familiar, before defecting from the Blue Sea and becoming part of the Sea of Death forces. Old had initially betrayed Meikai due to Meikai having passed down the Sacred Sword to Tatsumiya, inciting unbearable envy within him. This envy lead to his downfall, as Old betrayed Meikai and left him for the Sea of Death,

The feelings Old has for his former master is conflicting and strange. Upon encountering Tatsumiya and conversing with her, Old refers to Meikai in disdain. But despite his disdain, Old been shown to harbor unreciprocated romantic feelings to Meikai; Sheep has accused Meikai of seemingly "stealing" Old, suggesting that Old may have lingering affections for his former master.

Sal is Old's eldest son, although they do not know of their familial relationship. He and his father bear a strong resemblance to each other along with similar reasons to have chosen to side with the Red Sea.

Samekichi is Old's youngest son, although they do not know about their familial relationship. He and his father bear a strong resemblance to each other. The two have both been accused of being traitors to the Sea Kingdom. Tatsumiya makes this connection in the manga when thinking of Old and Samekichi's striking resemblance and seemingly same fate.

Old works under Mikotsuhime as one of her subordinates, he is regarded as one of the stronger denizens of the Sea of Death and is recognized in this high regard by the other residents.

The two were once familiars under Meikai, the great sorcerer. One day the responsibility of choosing the wielder of the Blue Sea Kingdom's Sacred Sword was given to Meikai by The Sea King, with the sorcerer being given the choice between his familiars Old and Tatsumiya. The moment Tatsumiya was chosen her relationship with Old was permanently shattered, as he betrayed her and their master.

Upon being found in the field of battle after Old betrayed her and Meikai, Old viciously attacked her, for the grievances that she had inadvertently caused him. Without any other choice Tatsumiya was forced to retaliate, giving Old permanent scars around his eyes.

The two are now mortal enemies, willing to slay the other without any other thought. Old holds an unshakable vendetta for her, and desires to watch her suffer for the suffering he was given by her hands. Inversely, Tatsumiya refuses to forgive him for his betrayal, holding no affection for him — partially due to his part in indirectly causing Meikai's disappearance.

Sheep is one of the Old's comrades in the Sea of Death, he has been shown feeling confused in their presence because of how touchy the ammonite was getting; Sheep on the other had shows to have an interest in the shark, this could be further proven by the fact that Old is the only thing listed in the Likes of their bio in the Bonus Room. They have been shown in artwork together.

Squid is one of Old's comrades in the Sea of Death; they have been drawn in artwork together along with Sheep.

Minami is Old's grandson. The two have never met. However, Minami apparently gets his height from him.

Namikaze was somehow involved with Old, winding up pregnant by him with Syakesan and Samekichi. The exact details of their relationship is unknown.

In-game, Idate interferes with Old's combat with Tatsumiya; it doesn't take too long for the shark to get beaten by the orca. Idate had described Old to be the '''wife-beater''' type and his distaste in "those type of guys," not to mention the orca's interest in beating up sharks is likely his motivation to proceed to attack Old (and succeeding). There is artwork of Idate holding a beaten up Old who is angry. Idate is impressed that, unlike Samekichi, Old is able to get back up from being beaten and still have energy to fight; in spite of this, their combat does not continue as Idate follows Wadanohara's request to take Tatsumiya somewhere safe.

In one omake Old is proven to be Samekichi and Sal's father, even though he is unaware of this. Old has been compared to Samekichi in the manga, as the young shark had been suspected by Tatsumiya to have been going down the same path as Old. The two share similar fashion sense as well as having scars on their body, they also have been accused of being a traitor. This could imply that Samekichi takes after his father; however his choices lead him to path opposite to his father's fate of residing in the Sea of Death. Old is one of Deep Sea Prisoner's top tallest characters, he is smaller then Satanick but taller then most characters who have listed heights. In an outdated QnA[1], when asked (jokingly) if Meikai was Old's wife, Deep Sea Prisoner did not answer the question and instead questioned where the question about Old's homosexuality came from. In the English translation while speaking he often uses a plethora of language commonly associated with pirates, such as 'lass' (when referring to Tatsumiya).