Mirai

Mirai (ミライ) is a supernatural who controls the future as one of the three Clock Keepers, along with Kako and Akane.

Appearance
Mirai is a very small-sized girl. She has long brown hair tied in twin tails, which are each as long as she is tall, with a hair ornament (resembling the hand of a clock) at the ends. She wears a crown-like ornament atop her head, and has a long fringe on either side of her face. Her eyes are a dark turquoise, though they are rarely open as she is usually shown smiling or laughing.

Mirai appears to wear three layers of clothing: a dark blue outer coat with a hood, a brown-coloured garment with a reddish trim in a diamond pattern, and a frilly long-sleeved white dress underneath. A small golden pocketwatch hangs from her collar, with a pair of hanging ornaments on either side, attached to the front of her cloak. She wears black clog-like shoes with "one" (壱) inscribed underneath.

Mirai is usually made to wear gloves to prevent her from using her powers, though she is not shown wearing them during the series.

Personality
Mirai is mischievous, cheerful, and energetic. She enjoys turning time forward with her powers, and appears to consider elderly and wrinkled people cool. Mirai speaks in a somewhat childlike manner, referring to herself in the third person.

According to Akane, Mirai's main trait is being dim-witted. She is also a glutton, likes grooming herself, and very nimble. Akane likens her intelligence and speed to that of a mouse, which seems to be true since they are able to catch her using a strategy that Nene used on her hamster.

However, Mirai does have a serious side, as seen when she is unable to turn Nene's time forward, and immediately realises the implications of this.

The Three Clock Keepers Arc
Mirai is usually kept in no. 1 boundaries and is made to wear gloves to prevent using of her power. However, at the start of the arc she managed to escape, and ends up in the school buildings. She visits Nene's classroom when the students are away due to Biology class. She used her power in the classroom, advancing the time, resulting in dusts everywhere, rusted desks, and broken windows. Her power also affects the student's belonging, such as making a student's lunchbox food goes bad, crumbling textbooks, and even made Akane's Hanitaro's head to crumple from time. Her powers doesn't seem to affect Aoi's belonging, possibly due to Akane's interference. The plant in the classroom also seems to grow enormously due to the power, which makes Nene notices that the incident might not be a simple prank done by someone.

After sometime, Mirai seems to wanders even to the Middle School building, as she turns Kou's friends, Satou and Yokoo into old people, leading Kou to investigate the matter. Nene, Hanako, and Kou starts their investigation by trying to search one of the three clock keepers, as Hanako currently do not have information on No. 1's whereabouts. As Hanako explains of his suspicion on how Aoi might be a supernatural, a girl's laughs could be heard in the hallway, and the window glass in front of them suddenly broke. At that timing, Aoi is also there, raising more suspicions. They tried to investigate Aoi, but they later found out that Akane is the one who held the Clock Keeper's power instead. Mirai only shows up again when Akane, Nene, Hanako, and Kou are in the infirmary, taking care of Aoi who's currently fainting, leading a student to scream for help as Mirai uses her power on everyone, turning them into grandpa or grandmas. The chaos continues until Mirai changes Lemon by sitting in his shoulder, exposing her to Nene and the others. Akane who noticed Mirai yells to her in order for her to stop what she's doing, as he tries to grab Mirai by slapping her from Lemon. She then laughs and escapes after jumping around again.

As Akane and Hanako forms a temporary alliance to capture her, Nene, Kou, Hanako and Akane holds a strategy meeting in the student council room. As they discussed, a munching sounds can be heard, and it took them a while to realize it. They searched the source of the sound, and it turns out that it was Mirai eating from the candy packages. The four of them tried to capture her, but as she was very nimble, she escapes easily. As Hanako and Akane collides from trying to capture her, she found a chance to escape, but was stopped by Kou who was waiting for her. However, she slipped from his hands, and overturns his capture and tries to makes Kou "handsome" by turning him into an old man. However, due to Kou's strong spiritual power, she's only able to advance time a few years, then she escapes the room. Nene who was stunned by the transformation, tries to capture Mirai in order to ask her to turn her into an adult with slender, beautiful legs, but to no avail.

Mirai is seen again running around while laughing ash she touches everything and advance time on them. As she grows tired, she spotted candy on the ground, instantly eating it. She found more later, and kept following the candies. To her surprise the candies were a trap set by Nene and co, and by the time she realizes, she was already caught by Kou's lightning cage technique, which were enhanced by Akane. Realizing her capture, she admits defeat and that her playtime is over. As Akane were about to put the gloves on her, Mirai disappears, then appears in front of Nene, wanting to turn her into a beautiful person one last time. However, Nene didn't change, and instead falls down lifelessly. This leads to Mirai asking whether the reason was because Nene herself doesn't have much time in her lifetime left. At the middle of the confusion Kako came and Mirai is seen being held in his arms.

Mirai stays in the background as Kou and Hanako bickers about Nene's lifespan. She can be seen cheering for Akane after Akane throws Hanako in order to mediate between he and Kou.

Kako
As the oldest among the Clock Keepers, Kako acts as their de facto leader. Mirai seems to be close to Kako, and worked with him to recruit Akane as one of the Clock Keepers, by using her powers to stage Aoi's near-accident while Kako spoke to Akane. To prevent Mirai from using her powers, Kako usually keeps Mirai in their boundary, though she escaped from him once, triggering the events of the Clock Keepers Arc.

Aoi Akane
Akane does work for Mirai and Kako under his contract with the Clock Keepers. As Mirai appears not to have a name, Akane calls her Mirai (literally meaning "future" in Japanese), and Mirai also uses this name to refer to herself. Despite Akane's generally negative attitude towards supernaturals, his relationship with Mirai appears to be somewhat like a frustrated elder sibling with a mischievous younger sibling. Mirai also cheers Akane on when he flips Hanako over his shoulder.

Number 1's Powers
Mirai governs the future as the third of the three Clock Keepers. Like the other Clock Keepers, a clock face appears above or on the target of Mirai's power when she turns their time forward. Mirai is often shown directly moving the hands of these clock faces to manipulate time.

Mirai is able to turn time forward for whatever she touches, causing objects to decay, window glass to break, and potted plants to grow into trees. She can also turn middle or high school students into elderly people, though their bone and facial structures do not change. In most cases, the people affected remain in the same clothes as before (with the occasional addition of a walking cane), but Kou has a different outfit after she turns his time forward, and is able to use new skills he will learn in the future.

Despite her childlike appearance, Mirai is very powerful, only becoming tired after turning much of the school's students into elderly people. Hanako also notes that not many supernaturals aside from the Seven Mysteries would be capable of such things. However, she has difficulties turning time forward for people with exorcist lineage like Kou, who only gets aged several years rather than decades. Also, Mirai cannot turn time forward for people who only have short lifespans left, and they appear to be rendered unconscious instead.

Mirai is very swift, easily evading capture by Akane, Hanako, and Nene. Though Kou manages to catch Mirai at one point, she still escapes by using her powers on him. Akane's power to stop time does not work on Mirai. However, Mirai can be trapped by a lightning cage, such as the one Kou is able to generate in the future. Kako is also able to undo Mirai's changes by reversing time, on an individual basis or for the entire school. In addition, as Mirai needs physical contact to use her powers, she cannot use them if she is wearing gloves.

Trivia

 * Her favourite snack is agar-agar (kanten) jelly.
 * Her latest concern is that Nene is the only person she cannot make wrinkly.
 * Mirai's pocketwatch appears to make an audible ticking sound, which gives away her position in the candy bag in the Student Union room.
 * "Mirai" is pronounced identically to "future" (未来) in Japanese, though it is written in katakana (ミライ).
 * Mirai also appears along with Akane in the back cover extra comic of the Afterschool Boy Hanako-kun volume.