TV-Series
Description
Endou is a central antagonist in the story, serving as the initial catalyst that plunges the protagonist into a world of high-stakes, life-altering gambling. He is the president of a loan company affiliated with the powerful Teiai Group, making him a professional debt collector and loan shark who operates with a chilling level of efficiency and cunning. His primary role is that of a manipulative opportunist, a thorough moneylender to the core who views people and relationships solely through the lens of financial gain and self-preservation.

In terms of background, Endou is first introduced as the man who comes to collect a debt from the protagonist, a debt incurred by co-signing a loan for a colleague who later disappeared. Instead of offering a simple repayment plan, Endou presents the desperate offer of a secret gambling cruise, the Espoir, as the only way to clear the massive, interest-accruing debt. This act effectively sets the entire series' plot in motion. It is later revealed that Endou was originally a direct subordinate to Yukio Tonegawa, a high-ranking executive within the Teiai Group, and was on a path to secure a similarly powerful position. However, after the protagonist's victory over Tonegawa in the E-Card gamble, Tonegawa fell from grace, and Endou’s career trajectory was shattered, relegating him to menial collection duties and leaving him in significant personal debt.

Endou’s personality is defined by his sinister cunning, pragmatism, and a cynical worldview. He is a consummate manipulator who uses his understanding of debtor psychology to control and exploit others, employing coercive rhetoric and, when necessary, outright fraudulent methods to achieve his aims. He is a bloodless and calculating individual who rarely lets personal feelings interfere with business, always prioritizing his own profit and security. Early in the story, he displays a clear sense of disappointment and contempt for the protagonist's enduring empathy and trust, which he sees as a fatal naivety that will inevitably lead to ruin. This belief in a harsh, dog-eat-dog world heavily informs his actions, as he scoffs at the idea of compassion having any place in financial matters.

Endou's motivations are consistently rooted in self-interest and the acquisition of money to secure his own position and freedom. After his fall from grace within the Teiai Group, his driving force becomes the desperate need to pay off his own debts and escape the precarious life of a low-level collector. This desperation makes him open to new, risky opportunities. His key relationships are almost entirely transactional, but the most significant and complex is his dynamic with the protagonist. They are uneasy and antagonistic allies, bound not by loyalty but by a shared goal of making money from a rigged pachinko machine known as the Bog. This partnership is a constant dance of mutual distrust, with Endou remaining alert for any sign of betrayal and the protagonist knowing he is dealing with a ruthless predator.

Endou undergoes a notable, if subtle, development during the Bog arc. At first, he is hesitant to join the protagonist's plan, but after witnessing the protagonist's incredible ability to survive desperate situations and hearing a well-reasoned strategy for a guaranteed win, he is swayed to cooperate. In a pivotal moment, he is emotionally moved by the protagonist's passionate appeals, showing a flicker of something beyond his usual cold pragmatism. For a brief time, he appears to become a genuine, if cynical, member of the team. However, this development is ultimately a deception. In the end, his true nature reasserts itself; he exploits a fine-print contract the protagonist signed in a moment of desperation, using a predatory interest rate to claim the vast majority of the winnings for himself. This final act reveals that his temporary "growth" was merely a calculated risk, and his core motivation of ruthless self-preservation ultimately triumphs. He coldly justifies his betrayal as a practical lesson, arguing that the protagonist's overly trusting nature would have led to his downfall regardless.

As a debt collector and former executive hopeful, Endou possesses several notable abilities. His primary skill is psychological manipulation; he is a master of using conversation and pressure to steer people into unfavorable situations. He is also highly meticulous and prepared, as demonstrated when he produces a collection of hundreds of name stamps to forge documents and pre-drafts exploitative contracts for any given scenario. He has access to financial resources and loyal subordinates, which he deploys strategically. While not a primary gambler, he shows a steady nerve for calculated risks, as seen when he ultimately decides to loan a critical sum of money for the final assault on the Bog, a gamble that allows him to clear his own debts and exit the story financially solvent.