A Sergeant Major in Pumpkin Scissors.

the longest serving member of the "Pumpkin Scissors" unit. Little is known about her past except that she was a part of the military band in her previous post. She serves as Captain Hunks' aide and is also responsible for taking care of Mercury.

Source:Wikipedia

A Warrant Officer in Pumpkin Scissors.

Graduated as one of the top students of the academy, the slight, bespectacled Martis provides the voice of reason and caution when out in the field.

Source:Wikipedia

A Warrant Officer who's part of Pumpkin Scissors.

Childhood friend of Martis. Oreldo is a handsome young soldier who fancies himself a ladies' man, yet seems to be something of a player.
He is very clever, resourceful and an expert at picking locks. His background has yet to be fully explained, but he seemed to be a street urchin before joining the military.

Source:Wikipedia

The commanding officer and administrator of the Pumpkin Scissors. He issues mission orders.

Character:
He provides a calm, steadying presence, which balances Lieutenant Malvin's impetuous nature. His personality is relaxed and informal.

Source:Wikipedia

The main male protagonist. A retired soldier who joined the Pumpkin Scissors to aid in their war relief effort. He was part of the secret 901 anti-tank-trooper unit, which basically consisted of foot soldiers trained to take down enemy tanks by themselves.
This unit, known also as the "Gespenster Jäger" (German for "Ghost Hunter") was part of the "Invisible 9". They are specially trained to ignore pain and fear in order to engage tanks and armored vehicles at point blank range. While the division was secret, all tank crews were warned to be wary of soldiers carrying a blue lantern.

Due to his reckless style of combat brought on from his conditioning/training to ignore pain and fear, Randel is frequently hospitalized during the series.

Character:
Despite his impressive stature (probably over seven feet) and a body riddled with scars, Randel's nature most of the time is kindhearted and ingenuous. But when he is in trouble he turns on his blue-steel lantern marked "901-ATT" and becomes a fearless and vicious combatant.
He is capable of defeating even heavily-armored foes with his 13 mm anti-tank gun, known as the "door knocker" (highly reminiscent of a Thompson Contender pistol).
Later shown to use another weapon which is a giant pair of shears, flashbacks showed it to be used to rip apart the metal plating armour of tanks to get to the pilot crews.

Source:WIkipedia

The main female protagonist.
Second in command and field leader of the Pumpkin Scissors. An inexperienced soldier of noble origin who graduated in the academy just before the ceasefire. She is the current heir to her family and is engaged to another noble, Lionel Taylor, who apparently supports her ideals. However, there are apparently romantic feelings between her and Randel Oland hinted throughout the series.

Character:
She has a strong sense of duty and justice and tries to live up to her family's military traditions, contrary to her father and sisters' belief that she must assume a more feminine behavior.

Ability:
Her weapon of choice is a short-sword with her family crest engraved on it, though on an occasion she shows her true skills in battle when brandishing her special weapon, a long double-bladed cavalry sword called Mahne.

Source:WIkipedia

The A.I. installed in the GARM motorbike.
She in shown working with Joseph and then later Amanda.

Source:Wikipedia

Amanda's partner and an officer of XAT, Hermann was a good friend of Gerd Frentzen, having raced with him for a long time. He was known as reckless and more often than not ignored orders.

He was turned into an amalgam.

Ability:
Hermann's Demoniac form is that of a red-armoured, demon-horned warrior with spiral motifs on his shoulder pads and head, armed with an enormous two-handed halberd equipped with a retractable chain-linked blade. He makes proficient use of the motorbike stolen from Zwölf, using it as a floating platform for aerial combat.

Source:Wikipedia

Joseph is one of the main characters, who is a lone, mysterious figure who serves as a Demoniac hunter and is often seen either talking to Elea or whittling a statue of the Virgin Mary.

Ability:
In his Demoniac form, Joseph can make use of an energy whip, which he can also turn into a narrow-bladed sword. He uses the GARM motorcycle (masquerading as a Yotsubishi custom model), which he can fuse with once transforming.

Source:Wikipedia