Sasha Kreutzev serves as an operative for Annihilatus, a specialized division of the Russian Orthodox Church dedicated to hunting spirits deemed non-existent. Her name appears variably romanized as Kreutzev or Croitsef due to transliteration challenges from Russian. Japanese fandom has speculated about potential male biological sex based on linguistic inconsistencies with Russian feminine naming conventions, though this theory lacks solid foundation and may stem from authorial oversight regarding language norms. Physically presenting as approximately thirteen years old, Sasha possesses long curly blond hair, typically concealed beneath a distinctive red hood and cape. She wears red pointy shoes and her torso and limbs are covered by leather belts. Metal braces on her ankles, wrists, and waist double as holsters for eccentric weaponry comparable to the Seven Tools of the Tower of London. Minimal form-fitting clothing and thigh-high stockings complete this attire, imposed upon her by her superior Vasilisa as part of personal interests—a fact Sasha openly resents. Her personality exhibits a unique speech pattern, prefacing statements with structured phrases like "My first question:", "My first answer:", or "A supplementary explanation:", indicating simultaneous multi-topic consideration. She displays a noted fondness for brandy consumption during work hours despite prohibitions and expresses strong aversion to luxury foods like sweets and gum. This aversion contrasts ironically with the gum-chewing preference exhibited by the archangel Gabriel during possession of her body. Sasha's chronological significance begins during the Angel Fall incident, where her physical form was utilized by the archangel Gabriel (using the alias Misha Kreutzev) to locate the spell's culprit. Post-incident, residual telesma—angelic mana—remained within her body in quantities rivaling the Holy Mother's, leading to Church-mandated observation. This residue later made her a target during geopolitical conflicts. Accompanying Vasilisa to London for Anglican-Russian Orthodox prewar negotiations, Sasha visited the Necessarius Women's Dormitory to informally assess allegiances. Her attire provoked commentary, leading her to attribute responsibility to Vasilisa and criticize the Russian Orthodox Church as "perverted" due to such tastes. Attendees misinterpreted this visit as seeking sanctuary from clothing-related mistreatment. The British Royal Family arc marked a turning point when Vasilisa alerted Sasha to her Church-ordered capture due to the internal telesma. Vasilisa renounced her affiliation by tearing contracts, enabling Sasha's escape through a snowstorm. Pursued by Sleipnir-mounted attackers, she was rescued by Vento of the Front, who guided her to the Elizalina Alliance of Independent Nations for sanctuary. This alliance was strategic, as Sasha's status as a high-value target would deter indiscriminate Russian attacks on the region. Tensions surfaced over her attire, particularly when Vasilisa-provided replacement clothes resembled a "Magical Powered Kanamin" costume, provoking Sasha's expressed desire to retaliate physically against her superior. In World War III, Fiamma of the Right targeted Sasha to exploit her Gabriel-linked telesma for summoning and controlling the archangel Michael via the Star of Bethlehem—a plan enabled by attribute confusion between Gabriel and Michael (the latter referenced as "Misha" in Russian). Despite efforts with allies including Vento, Lessar, and Touma, she was captured by Fiamma. Later, during Touma's confrontation with Fiamma, she disrupted Fiamma's control by drawing a counteractive magic circle before escaping with Lessar. Post-war, during the Magic God Othinus arc, she reappeared as a bodyguard for Russian Orthodox Patriarch Krans R. Tsarskiy at a United Nations anti-Gremlin conference in New York. Here, she admonished Vasilisa for cultural interests conflicting with Church orthodoxy, though the Patriarch dismissed concerns about inquisition. Sasha's capabilities center on spiritual tool weaponry—including levers, hammers, saws, screwdrivers, and pliers—stored on her person. Blessed by the Russian Orthodox Church, these objects generate magical effects for combat and torture, capable of creating craters or demolishing walls. They exhibit anti-spiritual and anti-demonic properties, disrupting magical-theological bonds and dispersing mana. Supplemental sources describe elemental water and holy ice manipulation abilities, including materializing water tentacles, generating waves ("Water Splash"), forming ice shields, and freezing opponents ("Ice Frize"). Additional capabilities include "Arcangel Eyes" for perceiving mana flow and spell vulnerabilities. However, her status as a potential saint or Gabriel vessel reportedly restricts her to holy-aligned spells and increases susceptibility to anti-saint magic. Her key relationships include Vasilisa—who rescued and mentored her but imposed humiliating attire—and Vento, an unlikely protector during her flight from Russia. The unresolved naming discrepancy and telesma's origin remain subjects of in-universe speculation.