For a spy organization, having someone in the team with off-the-chart abilities but no loyalty is absolutely unacceptable.
Anton remained in the Organization of Water not for money but simply because he found it amusing, raising the concern that the day he finds it less amusing, he might just leave the organization.
To say that Anton could turn hostile is a kindness; the man had no sense of right and wrong, no moral compass, and no concept of friendship. Yet, he had been involved in many significant events for the Organization of Water, and if Anton wished, he could annihilate the organization in minutes.
Yang Yi didn't expect every member in the Organization of Water to be completely loyal; that wasn't realistic. But he could control every single person within it, ensuring no one could betray the organization. Anton was the troubling exception.
