Riddle Rosehearts

Riddle Rosehearts is a second-year and the dorm head of Heartslabyul. He strictly upholds strange rules made by the Queen of Hearts. He's feared by the rest of the students because of his severe punishments toward those who break the rules.

Appearance
Riddle has red, mid-length hair that curves inward, V-shaped bangs covering his forehead, side bangs, and two strands of hair forming a heart on top of his head. He has a stern look and silver eyes.

He wears a small crown leaning on the left side of his head. His outfit consists of a white and red coat dress with the bottom being lined with a gold-colored fabric. The inside of the coat dress is entirely red and has a pattern consisting of tiny hearts, spades, diamonds, clovers, and crowns. He also wears white trousers.

Personality
Riddle Rosehearts is a hard-working individual and one who is fully determined to be at the top of his field, competent inside and outside of his school activities. He is known to help his peers in need, whether it be underclassmen, upperclassmen, or fellow students from the same grade. As studies are his forte, he will aid those who struggle academically, as seen with his interactions with fellow student and dorm leader Kalim, and his underclassman, Deuce. He is also capable of seeing potential in a person, as he views Epel as someone who can grow and reach to the fullest of his abilities and thus supports him in his growth. Riddle is also intelligent and more than capable in the fields and studies he pursued, often being the top of his peers and maintaining such position. As such, he is able to master studies that are supposedly above his grades, as he helped Cater, an upperclassman, in his studies.

Riddle sees the Queen of Hearts as a role model and holds dear the principles she has cemented, finding her elements befitting for all to follow as an example. Just like the Queen of Hearts, Riddle is a very strict and stern leader figure, demanding those around him, whether inside or outside of the dorm he orders to bid by the rules, and will not hesitate to punish those he saw has broken said rules. Like the Queen herself, Riddle has a short temper and has a knack of throwing tantrums. His tantrums are often seen when one points out his height, which is one of the shortest among the students. Riddle is known to be insecure about his height, and dislikes it when it is pointed out.

Magic and Abilities
Fire Magic: Riddle seems to be very adept at fire magic as seen in his Ghost Bride story, the beginning of the official manga, and other various times. In the manga, Riddle's fire magic is strong enough to completely destroys a Phantom Miner.

Unique Magic (JP)/Signature Spell (EN)
Riddle's signature spell is called "Off with Your Head!" (, Ofu Wizu Yua Heddo!). It causes a collar to lock around one's neck, sealing away their magic until he takes it off. . In the Episode of Heartslabyul manga, his signature spell can also be used on non-magic users even though it's not necessary. {{Spoiler section| While the collar cannot be removed by the victims themselves once it locks, it can be countered with defensive magic before the locking occurs.

Weaknesses
Only two instances have been shown: with Trey Clover in the climax of Episode 1, and with Leona Kingscholar in the climax of Episode 2 - The Rebel of the Savanna. Leona deflected Off with Your Head! using defensive magic while Trey overwrote Riddle's magic with his own Doodle Suit. In the manga, the collar doesn't seem to have any effects on Yuuken's visions. }}

Trivia

 * Riddle's name is an allusion to Alice in Wonderland's protagonist, Alice Liddell, as "Liddell" and "riddle" are phonetically similar in Japanese. The last name Rosehearts comes from the words "rose" as a reference to the Queen's favorite flowers; and "hearts" as a more overt reference to the Queen of Hearts.
 * His horse in the Horseback Riding Club is named Vorpal.
 * He can recite all 810 rules of the Queen of Hearts from memory.