Sparrow's Evil Anime Dad

Sparrow's Evil Anime Dad is the evil anime version of Lindsey "Sparrow" Devereaux III's father who often takes up an antagonistic role in Marching Peregrines' alternate universes or crossover fiction. He is an exaggeration (maybe) of Mr. Devereaux's canon traits, most prominently his narcissism and desire to turn Sparrow into a "worthy heir" through various immoral schemes.

Description
Mr. Devereaux is a billionaire in charge of a massive company that Sparrow is set to inherit someday. Because he believes that the Devereaux family reigns supreme above all others and he craves power, influence, and mo' money, he'll bring down any person in his way either covertly or using his money and influence to brush the event under the rug. He raised his son (one of many children by many different women) to believe that because of their status and bloodline, they're better than everyone else and entitled to more out of life. He doesn't mind (and historically hasn't minded) hurting or killing Sparrow's classmates in order to further his various goals, mostly those involving Sparrow. Oftentimes, he's depicted as wanting to train Sparrow to be superior to others by any means necessary. In many of these scenarios, Sparrow's childhood friend Helen Finch is also roped into his plots as Sparrow's "assistant" or "secretary" and put into the same dangerous circumstances (although it's unknown whether this was Mr. Devereaux's choice or Finch's choice in some circumstances).

Marching Peregrines/JoJo crossover
Sparrow's Evil Anime Dad serves as the main antagonist of the Marching Peregrines/JoJo crossover. After locating a Stand Arrow as a young adult and stabbing himself in an attempt to become a Stand user, he successfully manifested his Stand, Maneater (マン イーター, Manītā).

History
Devereaux continued to seek power in new ways after he attained his famous wealth and used his uncanny ability to make others feel indebted to him in order to create a massive corporate empire. He used this wealth in order to obtain a Stand Arrow and, with the reckless belief that his bloodline meant that there was a 0.0% change of failure, he stabbed himself immediately and manifested his Stand. This brought him even closer to the godhood that he desired, but in an attempt to create an heir that could further prove the strength of his bloodline (and create a loyal Stand User who he could manipulate with his Stand), Devereaux had children with many different women, stabbing the newborns with the Arrow; when they weren't able to manifest a Stand, he would dispose of the mother and try again with another woman. Sparrow was Devereaux's 13th child, and the first (and only) one to succeed in manifesting a Stand.

Devereaux trained Sparrow from a very young age to become the most powerful Stand User in the world. Sparrow became involved with the fine arts department at Pinedale High School, at which point Devereaux orchestrated a mass attack on the students of the fine arts department during a banquet which killed many students and turned some number more into Stand Users while Sparrow watched calmly and sipped a cup of tea. Following this event, any new recruits to Pinedale High School's Marching Peregrines would be shot with a Stand Arrow during band camp in an attempt to create even more Stand Users, with any public outcry over the victims of this indiscriminate hunt for "worthy" students being hushed by Devereaux's incredible charisma and even more incredible bank account. Devereaux had two main motivations for creating these new Stand users at his son's high school. First, because Maneater relies on the strength of other people's Stands, he essentially created a reserve pool of powerful Stand abilities that he could borrow at any given time using his status as a donor to the school in order to manipulate the students into lending him their power. Second (and more importantly), he gave Sparrow a wealth of opponents that he could kill using his Stand in order to better his abilities, essentially treating his "lesser" classmates as grind enemies. Sparrow's childhood friend Finch was shot when they were very young when Devereaux found out about their friendship, causing her to manifest the Stand Elastic Heart and indebting her to the Devereaux family.

Abilities
Devereaux's Stand, Maneater, can possess other Stands and enhance their abilities (we still need to figure out the exact rules and limitations surrounding it lol). He uses it in the final battle against Penny to possess Puffin's Stand Kero Kero Bonito to break Fledge's almost impenetrable defense and electrocute him to death.

Marching Peregrines/Danganronpa crossover
In the short-lived Marching Peregrines/Danganronpa crossover, Sparrow mentions that his father has forced him to participate in killing games every year in order to "build [his] morale", with Finch serving as his "Kirigiri/Nanami-esque sidekick".

Trivia

 * It's been suggested that Sparrow's Evil Anime Dad is a multidimensional being like Parrot, and that the reason why Marching Peregrines keeps crossing over with fandoms that would cause the characters to suffer is because the two are locked in a constant dimension-hopping battle. The JoJo crossover in particular may or may not have been brought about as revenge for Parrot's destruction of the JoJo Roleplay Dimension.