Fullmetal Alchemist Brotherhood is considered by many to be one of the greatest anime series of all time due to its well-developed characters, intricate plot, and themes of sacrifice and redemption. While some may argue that it is overrated due to its widespread popularity and acclaim, the majority of fans and critics believe that its high praise is well-deserved. The series has a strong following and continues to be highly regarded for its storytelling, animation, and emotional impact, making it a standout in the anime genre. **

Blood brotherhood is a ritualistic bond formed between two individuals, typically males, where they pledge loyalty, protection, and support to each other as if they were biological brothers. This bond is often sealed through a ceremonial exchange of blood, where each person makes a small cut on their body and mingles their blood together. This act symbolizes their commitment to each other and is believed to create a spiritual connection between them. Blood brotherhood is a sacred and lifelong bond that is taken very seriously in many cultures and is seen as a way to create a strong and unbreakable relationship. **

A parallel universe typically refers to a separate reality or timeline that exists alongside our own, often with slight variations in events or outcomes. On the other hand, a multiverse is a broader concept that encompasses the idea of multiple parallel universes existing simultaneously, each with its own set of physical laws and conditions. In essence, a multiverse is a collection of parallel universes, while a parallel universe is just one of many potential realities within a multiverse. **

The Aryan Brotherhood is a white supremacist prison gang that primarily targets minority groups, including African Americans, Hispanics, and other non-white inmates. They also target prison officials and staff who they perceive as a threat to their operations. The gang uses violence and intimidation to maintain control and power within the prison system. **

Blood brotherhood is not commonly practiced today in most cultures. The tradition of forming a bond through a ceremonial exchange of blood has largely faded away with modernization and medical concerns. However, some indigenous communities or certain groups may still practice blood brotherhood as a way to establish strong bonds and alliances. Overall, the practice is rare in contemporary society. **

Fullmetal Alchemist Brotherhood is widely regarded as an excellent anime series. It has received critical acclaim for its well-developed characters, complex storyline, and thought-provoking themes. The series also has a dedicated fan base and has been praised for its high-quality animation and emotional impact. Overall, Fullmetal Alchemist Brotherhood is considered to be a must-watch for anime fans and is often recommended as one of the best anime series of all time. **

There could be several reasons why the Dark Brotherhood courier isn't coming. It's possible that the Dark Brotherhood has no interest in recruiting new members at the moment, or they may have deemed the potential recruit unworthy. Additionally, the courier could have been intercepted or killed before reaching their destination. It's also possible that the Dark Brotherhood's operations have been disrupted or they are facing internal issues, preventing them from sending out couriers. **

Opinions on whether Fullmetal Alchemist: Brotherhood is the best anime vary among viewers. While it is highly acclaimed for its storytelling, character development, and animation quality, some may prefer other anime series based on personal preferences. Ultimately, whether Fullmetal Alchemist: Brotherhood is the best anime is subjective and depends on individual tastes and criteria for what makes an anime the best. **