Crona is a demon sword meister and the the biological child of the witch, Medusa Gorgon. The meister partner to the actual demon sword, Ragnarok, they're driven by their mother's aim into turning them into a Kishin. Described by Franken Stein and his Soul Perception to have an "introverted" personality, Crona is pessimistic and doesn't hold a high opinion of themselves. Due to being raised by Medusa Gorgon, they are extremely negative as well as nervous and submissive most of the time, playing a part of their bullying from Ragnarok. Possessing a great amount of shyness, Crona cites they're unable to "deal" with many things, whether it pertains to a situation, an action, or a specific individual. This causes them to complete shut themselves down from their surroundings. Perhaps what makes Crona a dangerous enemy is their unbalance state of mind and inclination to insanity (Madness mindset). This unbalanced state of mind originates from not only the influence of the Black Blood's Madness, but namely the abuse they suffered from the likes of both Ragnarok and Medusa as she drilled and tortured them into learning the ability to kill. Because of this, Crona is subjected to showing signs of insanity and aggression, spouting senseless comments and laughing at random moments. This level of abuse has caused them to gain a warped objective of attempting to become an Kishin in an attempt to be able to "deal" with any given subject as well as fulfill Medusa's goal and gain not only her acceptance and love but to avoid being abandoned by their parent. Of their own admittance, Crona doesn't understand the concept of morality. After meeting Maka and their enrollment into the DWMA, Crona stated showing more positive traits and was capable of feeling the need to protect Maka, who was previously their enemy. Their placement within Death City and DWMA caused Crona to become relaxed and happy in demeanor.[16] Much of this development was lost due to some sort of amnesia when Medusa re-integrated their Madness mindset after capturing them back into her ranks. However, Crona gained much of themselves after Medusa's passing and capture by Asura, reflecting on their actions and finding it unforgivable. In a final heroic turn, Crona even opted to seal themselves with the Asura with the usage of the Black Blood and "BREW" for the sake of Maka as well as the entire world. Crona themselves possess some quirks. Their negativity has enough "destructive power" to write a poem able to evoke others to regretting their existence, even those as obnoxious as Black☆Star or the undead like Sid. Crona also has the tendency to redundantly remind others of having Black Blood in battle. Due to their shy and nervous personality, Crona has a knack for naming parts of rooms such as "Roomsky Kornerkov" as well as having shuffling footsteps in general. They have odd, repetitive speech, and tend to say they don't know how to deal with certain things, very anxious and tend to stutter. They think Maka is their savior, therefore they only really care about her in specific and not really anyone else, comfortable with physical contact when it comes to Maka and hugging often. They eventually end up moving in a dorm with Maka and Soul.

A two-star demon weapon born in a family of famous musicians, the Evans family. Upon discovering his weapon heritage, Soul eventually joins Death Weapon Meister Academy where he partnered with the scythe-meister, Maka Albarn. Since partnering with Maka, Soul eventually became an elite in the EAT class. Soul can be described as a young man who tends to act cool, often has a nihilistic smile, and hides a more passionate side to his personality, in which allows him to be compassionate and kind to the point of being able to risk his own life to protect others, especially his weapon partner. Early on, while he seemed a to preferred an impulsive direct approach to some situations, in more serious situations, he did not. Despite his appearances, he has an aspect of him more mature than others his age, being able to keep a cool head in situations, having a sensitive nature, and being insightful. Franken Stein also remarked that he possess a rebellious and cynical soul; while latter makes him less willing to believe deceptions such as those claimed by Medusa or Giriko and more likekly to be suspicious others' intents, it also created difficulities in creating his own sense of identity for himself for a time.[18] This aspect was compounded with his envy of his older brother's musical talent, once a major source of insecurities. Soul is also prideful, leading him to often argue with his own meister partner.[13] Another insecurity is lacking in physical power compared to lone weapon specialists (Giriko and Justin Law), stemming from a desire to be capable of on his own to protecting his partner. Soul appears as a teenaged young man with white hair and red eyes.