Darkaya Onee - Story of lost princess

Darkaya Onee was born in family of poor female in small Village of Nel. She didn't knew anything about her father, though her mother was satying that he was a honest and kind person. In her childhood, Darkaya was a very nice girl, she loved to read adventure and fantasy books and dreamt to start her own adventure. In her 6 mother let her to go to the Mahou University in the big City of Undermoon. She mastered here her ice magic skills, that she started to use in her childhood. She met her two best friends here - Serph named Katyano Zwuwave and Demi named Demonia Ogameth. Katyano learned a Sound Magic, and Demonia learned Fire Magic. They were bestiest friend here. When in their 18 years they ended the Univercity, Darkaya suggested to come to her birth village, but when they came, it was destroyed...
Darkaya in tears came to her mother's home and she found her Dead body... in her dead hand was a letter, where was a name - Blizz, and directions to some temple. Darkaya and her friends decided to come here, and they found a temple. Inside they found some trials to test their friendship, and in the end they found weapons. Blue Trident-like spear, Red Sword-whip. and a White Gun. They took the weapons, Demonia took Sword, Katyano guns and Darkaya took spear. But they were shocked as Spear was talking!
Spear told her his name, Blizz, and said that he knew her mother - as he was a weapon of King Shiver. Darkaya decided to set on journey to find kingdom where lives her father. 
Before they journey, they go to the garden and made oath - oath of sisterhood. They made oath to be sisters forever and ever, to die in the same year, month and day. 
Thus were born the Onee Sisters. They set on journey to find the Kingdom of Shiver. They met a lot of friends, but that's another story...