Why Do Some Manga Characters Wield Colored Swords?

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!In this whole new world, he was born again and got to explore the fantastic martial world!

"Master, do you miss this apprentice?" Lips painted in bright red ticked up in a sharp smile. Her eyes were a pool of dark red, like a swirl of the finest wine. One jaded hand in his throat, nails slightly digging in the skin there, the other was on his cheek carefully caressing. The clashing of both gestures were confusing, but Rion's mind only provided one instinctual response; to run away as far as possible. ----- Rion Ren, one of the strongest sword masters in the world, had to make a difficult decision to hand over his apprentice, Ruby, to the Demon Master when Ruby's real identity as a descendant of Demon Sovereign was revealed. Three years later, Ruby who had successfully taken the reign of the Demon Realm, came back to take revenge on her master that had betrayed and abandoned her in the hand of cruel demons. Rion swore on his life as a sword master, he only wanted to protect those who were precious to him, but how did it manage to turn the whole world into chaos? How would Rion face his own apprentice in a battle between life and death?!

Catherine is not your ordinary student. She may be 19 but she's already a millionaire at her age. She was an adopted daughter by a multi - millionaire Japanese woman who has a son for an heir to her other organization. Though she may be a millionaire, she wanted to earn her own penny. She came home from a tiring job during winter. As her exhausted body resigns, she found herself falling to the floor. Upon opening her eyes, she notices the unknown sword that she never knew. The sword has opened a portal and she was sucked to the new world. An era older than her... An era she never know... As she uncovers the secrets of this era, she will be in line to the throne. A position she never dreamt she will be dealing. A twist of fate... She has to choose which world she prefers: In her world where it is peaceful living with Hajime and her dull boring life or the old era where she can have an unending adventure and a kingdom with her friends of the "past"? Catherine must face two worlds and meet people, she must decide which world she would want to stay. Catherine must face the present empress , Destiny and learn how to bout her choices. (Revisions, corrections on grammars and revelations ongoing)

When his village was attacked and burned down, five-year-old Xiu Zhangjian chose to escape. Living in disguise for many years, he always prepared himself for revenge. One day, the sect headquarters where he lived was attacked. He made a different decision: instead of running away, he approached the enemy by choosing to become a slave in the palace prison. All the prisoners and guards knew him as a weak and stupid slave. However, at night, he secretly showed his true abilities. Until the time came, Xiu Zhangjian reclaimed the Sacred Dragon Sword. With the sacred ancestral sword in his hands, he fulfilled his duty as the heir, eradicating the evil of the black sect alliance. "I swear, they will beg for death!"

Boro Malus, and his family, lived in shame and exile after the death and defeat of his father Bora Malus. The King, enraged by the loss of his greatest warrior, stripped Bora, and his family, of all their lands and titles and banished them to live in the outskirts of the kingdom. Boro grew up with two things on his mind after the shaming of his father. The first, to return the honor to his family's name, and second, to take his father’s title of Greatest Blade-master, for himself.

While taking a trip to Ohio with her family 16-year-old Sakura tattoo receives a magic necklace containing the powers of a being known as the swordkeeper she must now use these powers to find magic weapons and save an alternate universe