The Bounts (バウント bounto) are a group of humans with special abilities. They are the main antagonists during the anime-exclusive Bount and Bount Assault on Soul Society arcs. The Bounts live eternally due to an accident during a scientific experiment earlier in the Soul Society, where they were created, and began to eat the souls of human beings to gain more power. They each have a unique weapon known as a Doll, a familiar which is its creator’s power given physical form. Dolls are mostly self-sufficient creatures when released, although they tend to be used as weapons in various ways such as a large battle axe or a snake, as a sword and whip. Their leader Kariya, motivated by the destruction of himself and all connected to him, plans to invade the Soul Society along with the remaining Bounts to destroy it and themselves. However, with the exception of his friend Gō Koga, Kariya managed to have his forces wiped out by the Soul Reapers prior to himself being killed by Ichigo Kurosaki. IGN criticized the Bounts as being “lame bad guys,” noting that the bittō (the Bounts’ mosquito-like creatures that collect souls) in particular were like “something straight out of a bad sci-fi movie,” but admitted the Bounts were “decent plot devices” to develop the other characters.
Xcution (エクスキューション Ekusukyūshon) is a secret organization in Naruki City that makes itself known to Ichigo seventeen months after he loses his Soul Reaper powers and serve as the main antagonists in the first arc after the timeskip. The group is made up of humans whose preborn encounter with hollows resulted in them becoming outcasts who possess a power known as Fullbring (完現術（フルブリング） Furuburingu, lit. “Final Manifestation Art”), an ability to manipulate the “soul” of an object to bring out its full potential. But a Fullbringer’s true power comes from enhancing the soul of an object they are compatible with, such as a prized possession. However, the effects of a Fullbringer’s power will cease once the user is dead. Using Tsukishima’s Fullbring, Xcution’s other members had placed themselves in a fabricated notion that they need a Soul Reaper to become normal humans and train Ichigo to use Fullbring. But once Tsukishima restored their memories, the group reveals their real intention to take Ichigo’s Fullbring powers. Though Xcution got Ichigo’s Fullbring, they were scattered after Ginjō’s death.
The Wandenreich (見えざる帝国（ヴァンデンライヒ） Vandenraihi, “Invisible Empire”) are a group of Quincies under Yhwach who serve as the antagonists of the final storyline of the series. Their attire usually consists of long white trench coats fitted with numerous buttons, a cape, a belt (usually a piece individual to each member), and a five-pointed cross, the Quincy Zeichen, somewhere upon the uniform. The Wandenreich named their group from the act of hiding themselves and their fortress Silbern (銀架城 (ジルバーン） Jirubān, German for “Silver”, Japanese for “Silver-Wrought Castle”) within a pocket dimension in the Seireitei’s shadows called Schatten Bereich (影の領域 （シャッテン・ベライヒ) Shatten Beraihi, “Shadow Realm”). Apparently founded by the survivors of the Quincy massacre a millennium ago, the Wandenreich have been preparing to exact revenge on the Soul Reapers once amassing enough power to do so once their leader is revived. In the aftermath of Aizen’s defeat, the Wandenreich conquered Hueco Mundo and captured numerous Arrancars (including the former Espada Tier Harribel) to serve as their personal Vanguards and foot soldiers. The Wandereich orchestrated two invasions on the Soul Society, the first leading to the notable deaths of Squad One’s Lieutenant Chōjirō Sasakibe and Head-Captain Yamamoto. After having absorbed the Soul King and altered the Royal Palace by submerging it with the Silbern, renamed the Wahrwelt (真世界城 (ヴァールヴェルト） Vāruveruto, German for “True World”, Japanese for “True World Castle”) the Wandenreich plans to create a new world order as envisioned by Yhwach, which would require a total genocide by destroying the Soul Society, the Real World and Hueco Mundo, and create this new world for Quincys from the ashes of destruction he intends to cause in all the spiritual and physical world as Askin Nakk Le Vaar thought, but the truth is that, after absorbing Ichigo’s powers after defeating him and the last two Sternritters survivors, Yhmach reveals his true goal is to eliminate all life in existence for bringing ruin and death to all living begins (including his children, the Quincys) in existence, for all eternity.