Initially known as the Princess of Kimlasca-Lanvaldear and Luke's fiancée, she fully believes that the function of nobility is to tend to the needs of their subjects. She is 18 and is loved by her people for her various public works projects.
As the game progresses, it is revealed that Natalia is not the birth Princess of Kimlasca-Lanvaldear and that her biological father is Largo the Black Lion of the God-Generals.

Source:Wikipedia

Luke is the main character. He is 17 and is the only son of a noble family in the kingdom of Kimlasca-Lanvaldear. After a kidnapping incident, all of his childhood memories are erased, causing him to be very selfish and ignorant of the real world.
As the game progresses, Luke learns that he is actually the "replica" of Asch, the real Luke fon Fabre. This event, along with the abandonment of his friends, prompts Luke to change himself for the better.

Source:Wikipedia

Ui is Yui's younger sister, who begins the story as a third-year junior high school student but later enters Yui's high school the following year in the same class as Azusa.

Unlike her older sister, Ui is mature, responsible and handles household chores well. Ui also shares a strong relationship with Yui and has a great deal of love and respect for her older sister. She takes particularly good care of Yui and strives to look after her even at the risk of her own health.

Despite being a year younger than Yui, she is nearly identical to her with her hair down and is even once able to fool the club. She eventually joins the Light Music Club along with Jun at the end of the series, becoming a guitarist like her sister.

Source:Wikipedia

Often referred to as 'Mugi' by her friends, she is known as a wealthy girl with a gentle and sweet personality, who plays the keyboards in the Light Music Club.

Despite her wealth, she is fascinated by and finds joy in "normal" activities, such as ordering fast food, sharing french fries with her club mates, holding down part-time jobs and haggling over prices.
Since her father also owns a maid café, she often brings confectionery and an assortment of sweets and pastries to the club room, where she diligently makes tea with a tea set that is kept in their club room.

Tsumugi is considered a piano prodigy since she has been playing the piano since she was four and has experience in winning various piano contests.

Tsumugi displays a rebellious streak occasionally, diverting from her normally well-behaved and mature demeanor to the surprise of the others. She also displays a childlike eagerness from time to time.

Source:Wikipedia

Ritsu, or otherwise known as Ricchan, is the self-proclaimed president of the light music club and plays the drums. She says she chose to play the drums because they are "cool" but she then admits that she has trouble playing instruments which involve intricate finger movements, such as the bass, guitar and keyboard.

Ritsu is cheerful, often likes making jokes and is sarcastic most of the time. She has an ambiguous yet upbeat personality, much like Yui, but often has trouble remembering important club activities and announcements and gets constantly rebuked by Mio for forgetting to send in important forms concerning the club.

She is a childhood friend of Mio and will often take the opportunity to tease her whenever Mio is cowering from something. She also has a younger brother named Satoshi.

Source:Wikipedia

Nodoka is Yui's childhood friend and confidant, who is a member of the school's student council. As a normal, well-mannered and intelligent girl, she is generally taken aback by the light music club's odd behavior. She shares the same class as Mio in their second year, who appreciates her companionship tremendously, since she being the only person Mio knows in her class. In her third year, she becomes the student council president and is also in the same class as the other third year club members. She gradually becomes the president of Mio's fan club through means that was not within her will.

Source:Wikipedia

She attended Sakura High with Sawako Yamanaka, and like her, is a former guitarist in the heavy metal band Death Devil. She made her appearance in the second season to reunite the band for a performance at a former classmate's wedding reception.

She goes by the stage name of "Christina".

Source: Wikipedia and Wikia

Sawako is the adviser for the wind instrument club at the girls' school. An alumna of the school and a member of the light music club in her student days, she does not want people to find out that she was formerly a member of a death metal band called Death Devil, of which she was both lead guitarist and vocalist and went by the stage name of "Catherine". She thus covers up by being mild and gentle to her coworkers and especially to the students.

She is forced to be the adviser of the 'light music club' when Ritsu blackmails her after the girls learn of her past. Though she has a mature and gentle demeanor in the school, Sawako (affectionately addressed as "Sawa-chan" by both Ritsu and Yui) displays a totally different, completely authentic character when she is alone with the 'light music club'.
In reality, she is rather wild, lazy, and is quite an irresponsible teacher who enjoys dressing up the girls in (sometimes embarrassing) cosplay costumes like French maid uniforms. She gets a thrill out of the rare moments where she is praised for her work.

In spite of her laziness, she still proves herself to be an able mentor, as shown by her willingness to coach Yui as the lead singer and attending their performances. Her music abilities apparently have not dulled over the years, as she is able to substitute for Yui at the school festival at almost no notice without the assistance of a music score, even without any prior practicing of the band's song.

She becomes the girls' homeroom teacher in their third year.

Source:Wikipedia

She is a full-body cyborg employed as the squad leader of Public Security Section 9 in Ghost in the Shell . Her various incarnations in the manga, movies, and TV series all portray her differently.
Since each of these has an independent storyline, Kusanagi's physical and mental characteristics have been modified in different ways to reflect the focus of each respective story.

Known to her colleagues as "The Major", Kusanagi is a highly skilled operative with an playful, though introspective and philosophical personality. Little is known of her early history, though the television series hints at some of her background, usually through flashbacks and commonly from the points of view of others, rarely from her own.

At the end of the series Kusanagi confessed that she couldn't remember what her real name was, indicating that Motoko Kusanagi is actually only a pseudonym.

Source:Wikipedia

Usually addressed as Hilda , she is a demon maid who helps Oga take care of Beelzebub IV.
She reveres the Demon Lord and feels that it is a great honour to be chosen as the child's "Mother" or caretaker. Her most characteristic features include her Gothic Lolita appearance and frontal assets. She owns an umbrella which conceals a sword in the handle.

She takes being Beel's mother quite seriously and even goes as far as to state that it was the only reason for her existence. As a fighter she is quite skilled. Her skills gained her the nickname "Oga's Bride" at Ishiyama. Hilda and Oga's rapport is pragmatic for the most part. Hilda often looks down on him and never hesitates to mock him but at the same time acknowledges his strength and allies with him in Beel's interest.

In the anime she has developed an interest in watching soap opera, much to Oga's disbelief.
Her name comes from the Old High German name "Hildegard", meaning Hild (war or battle) and Gard (protection) and means "protecting battle-maid".

Source:Wikipedia