Berserk is popular for its dark story and meaningful characters. However, with his vague guidance and unexplained past, Skull Knight is a character with obscurities that may never be explained. Regardless, he is not the only figure in anime to be shrouded in such mystery.
There are characters in a variety of stories that exist suspiciously beyond the precursory scope of understanding. These are characters who have a mythological origin. They stir fans' imagination by walking the line between truth and enigma. Here are eight other mysterious characters like Skull Knight from Berserk.
Disclaimer: This article reflects the author's opinions.
Ken Kaneki, Hei, and 6 other enigmatic characters like Skull Knight from Berserk
1) Ririka Momobami (Kakegurui)

Ririka Momobami operates in a quiet manner with intentions that are hidden. This lends an air of mystery in terms of her true desires that are difficult to understand. During pivotal moments, she shows discerning knowledge and power, leaving others uncertain as to what her objective is.
Similar to the Skull Knight in Berserk, she occupies the shadows to guide events while not revealing her complete self and abilities, and that allows her to maintain a sense of uncertainty near both her allies and rivals.
2) Aizen (Bleach)

Aizen has an air of mystery about him because he is able to stay a few steps ahead of everyone while developing a plan that takes longer to establish than anyone suspects, while also masking his true goals until the moment he strikes. Even from the beginning, Aizen's calmness hides a mind that is putting things in motion on an immense level, and treating the situation and the characters like a real-life game of chess.
Aizen is similar to the Skull Knight in Berserk in that his presence has an unsettling weight, as if he exists outside of this immediate conflict and is driven by motivations that are eternally out of reach.
3) Obito Uchiha (Naruto Shipuuden)

Obito Uchiha is a character filled with a sorrowful past and manipulation. Throughout the story, he has been changing loyalties. Like Berserk's Skull Knight, he works in the shadows at an unimaginable scale while hiding his true intentions from others.
Obito is surrounded by layers of mystery that are not exposed until the very end of the story. He attempts to make it hard for others to put him as a friend or even an enemy.
4) Mei Misaki (Another)

Mei Misaki's calmness and aloofness have a weird air about them; the combination of not understanding her mood or actions creates a sense of uncertainty about her intentions. She has the ability to mysteriously show up and do things without a full explanation, as this shrouds her in secrecy.
Similar to Skull Knight from Berserk, she has ties and motivations for everything that may never be fully revealed. In the story, she shows up mysteriously, providing clues and hidden truths.
5) Ken Kaneki (Tokyo Ghoul)

Ken Kaneki remains mysterious because his motives and true mindset are often puzzling. He leaves others uncertain as to where his allegiance lies. He develops throughout the story, but it is hard to determine if he is a hero or an anti-hero because of his unpredictability.
He appears at the most important times, always making the correct choice. This confuses the audience as to whether he is guiding the event or he has a hidden motive.
6) Hei (Darker than Black)

Hei is shrouded in secrecy and mystery. Whether it is his goals or his origin, anything is hardly ever made clear. He always stays in the shadows and brings little of his own feelings to situations, while also carrying an unknown weight. His calm, unreadable face is inscrutable but has some story to tell. People around him are left to ponder who he really is and what his purpose is for being there.
Similar to Skull Knight from Berserk, the viewers of the anime keep questioning what truly drives him and what he is ultimately seeking.
7) Koro-Sensei (Assassination Classroom)

Koro-Sensei's ambiguity comes from the mysteries surrounding his origins, full potential, and reasoning for leading a radically different life. Although he shows attributes of sadness in relation to his past, the standards shown are only fragments of those past events. Thus, a lot has to be filled in the gaps by the audience.
Much like Skull Knight in Berserk, he carries an impression of ancient representativeness and associated motives. Audience has to imagine Koro-Sensei as part of a bigger, more stupendous existence.
8) Uta (Tokyo Ghoul)

Uta is a character that stands out as a mysterious figure due to his unreadable intentions and confusing appearance at key times. It creates a mysterious persona that seems to confuse loyalty.
He operates by creating opinions, ideas, and attitudes while obscuring or diluting his own opinion, similar to Skull Knight from Berserk. His silence and unpredictability ensure his purpose is always unknown and a point of interest.
Final thoughts
Whether it is Ken Kaneki's emotional change or Ririka Momobami's silent manipulations, these characters reflect Skull Knight's ability to functionally facilitate the story while hiding an even larger truth. Aizen's far-reaching plans, Obito Uchiha's shifting loyalties, Mei Misaki's vagueness, Hei's shadows, Koro-Sensei's hidden motives, and Uta's countless possibilities all have a similar kind of quality to their mystery.
Like Skull Knight from Berserk, they exist in the grey, leaving the audience to question their narrative purposes, while keeping their mystery alive, and in the process, becoming a lasting enigma in their world.
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