Shamshir's history can be found here.
Shamshir, also known as her full name Shamshir Zamouk, is one of the characters from Pop'n Music 14 FEVER!. She is the first Zektbach crossover character to appear in Pop'n Music.
What? The master of swords dancing, Shamshir, has appeared. Her equipment is loose clothing and a sword of the desert. Would you like to accompany her?
A "shamshir" is a curved Persian saber having one edge on the convex side.
Shamshir herself carries one of these as well.