Lieselotte Sherlock

17 years old, height: 155cm, measurements: B 85/W 56/H 84. One of the "Trinity Seven." Her specialty is numerology (Logos Art). Her "archive" is Sloth (Acedia), and her "theme" is Stagnation (Stagna). The grimoire she possesses is "X=arkhē." Her secret technique is Space-Time Rift (Baal Peor). She is commonly known as the "Infinite Magician."

The protagonist of the spin-off "Liese Chronicle." She is Selina's twin sister and a former second-in-command inspector of the Royal Library. She was also a member of the former Gospel Research Society. She became a candidate for Demon Lord and caused the "Collapse Phenomenon" from the hideout (Eternal Library), attempting to steal the magic of all the Trinity Seven. In the battle within the Space-Time Rift created by her ultimate magic (Last Crest), she initially gained the upper hand but was defeated when her actions were predicted and countered with true word magic. After being defeated by Arata and the others, she remained in the "super-speed world" as a consequence of using her ultimate magic. Unlike her sister, she has well-developed breasts and wears a revealing costume in Magus Mode.

In the battle with Lugh, she returns to the real world in spirit form by borrowing her sister's body and rejoins the Trinity Seven. Later, she helps Arata, who was on the verge of going berserk due to a Demon Lord weapon, in the Sky Library and teaches him numerology, allowing her to return to the real world with her body.

Although the details of her return to the real world are not depicted, she re-enrolls at Biblia Academy. Like the other Trinity Seven, she has feelings for Arata and expresses a desire to "do any favor" for him. When she meets Anastasia L, she refers to herself as "Arata's night lover." According to a short story, Selina claims that "she pretends to be experienced despite having no experience," to which she hastily replies, "I have no experience, but I have a wealth of knowledge."

She was considered a mathematical genius from a young age and was scouted by Master Biblia for her talent. When her hometown was destroyed by a monster attack, she reached magic on her own by performing extraordinary calculations to counter the monster that tried to devour her.

In the Great Magic Research Battle, she partners with Arata as the evil magician representative, showcasing ultimate magic-class grand magic. However, she is defeated in the first round while protecting Arata, who was suffering from the erosion of the Demon Lord factor. Later, she is attacked by a Demon Lord Knight imbued with Arata's magic by Anastasia but repels it with Selina, who awakens as a magician from an apprentice.

At the beginning of the Divine Comedy Gate arc, it is revealed that she has gone missing again, but it is later discovered that she was secluded in the Eternal Library to master the Demon Lord factor returned by Sora. She dons the manifestation attire of Sloth, "Belphegor," and rushes to Selina's aid, demonstrating immense power by instantly analyzing the magic of the Twelve Demon Generals and achieving complete control over ultimate magic.

Having spent an enormous amount of time in a stopped world, the density of her research accumulated there surpasses that of the other Trinity Seven. After the Demon Lord factor was returned, her power was further honed, and she displayed the ability to easily handle the Twelve Demon Generals, even though she had lost her reason. However, Akio is concerned that she may be delving too deeply into magic. In the story, she also shows a limited deployment of her manifestation attire, adding Belphegor's horns to her usual Magus Mode.

She possesses the talent to connect with infinite versions of herself in different time-spaces, which is the origin of her nickname as the "Wanderer of the Infinite World." In the β time-space, she forms a friendship with Aries, the only "Trinity Seven of Sloth" who is not herself, and becomes close friends. Although she forgets her memories of defeating the Demon Lord and other experiences with Aries due to the world's corrective power when returning to her original time-space, fragments of those memories remain.

In the new chapter, she encounters and battles Aries, who appears to recruit Selina as an arbiter. Her memories of the events in the β time-space are synchronized with Aries, and she recalls them. During this time, Aries reveals that her existence has become unstable due to becoming an "Infinite Magician" capable of defeating the Demon Lord, suggesting that she may disappear in the worst-case scenario.

“β time-space” Lieselotte Sherlock

A different time-space version of Lieselotte appearing in the spin-off "Liese Chronicle." Initially, it was considered that the Liese from the main story might have possessed her in this time-space, but she later appears affirming another prediction that she exists as a different person.

In the childhood incident where Liese awakened as a magician, she chose to "return to the mansion and confirm the hidden 'something'" instead of "escaping to Master Biblia." During this time, she accidentally caused Selina's death and conducted research to somehow keep her alive, which affected the main story's time-space, forming the core of the side story. Additionally, during this process, she came into contact with Pythagoras, the progenitor of numerology, who had become the demonized Twelve Demon General, Cagnazzo. She was watched over by his aspirations and engraved with the depths of numerology, gaining power comparable to a Grand Duke.

She obtained the progenitor treasure of the Sloth Archive, Gleipnir, in her hometown, allowing her to absorb magic from other time-spaces. After the incident, she barely kept Selina alive by performing a magic fusion (Mystic Fusion) with her deceased sister, but later, during a battle with Liese and Aries from the main story's time-space, Selina's personality finally disappeared while protecting her. Despite this, she continued to absorb Gleipnir's power, achieving demonization (upgrade), but was defeated when Liese's magic rewound her body to her younger self at the time of the incident.

Ultimately, to stop the rampage of Chronos, who awakened as a Demon Lord, she agreed to be trapped in infinite time as one of the "Lieses." By fusing with the mythic armament, she connected all the Lieselottes existing in infinite time-spaces, isolating Chronos from the world with her immense computational ability. In the world after Aries remembered everything and performed the restoration of all time-spaces, she successfully repelled the demons and saved Selina by obtaining Gleipnir in advance. Additionally, in the restored world, since Aries initially disappeared, this Liese took the position of the Trinity Seven of Sloth in the subsequent β time-space.