What is "tishma"

Tishma is a female rock music singer, musician, lyricist and music composer in Bangladesh. She is also known as the "Rock Princess of Bengal" among her fans. She is a singer, music composer, songwriter, record producer, music director, arranger, conductor, guitarist, keyboardist, rapper, rock musician, and plays different types of musical instruments such as guitar, keyboard, and drums, and is Bangladesh's first female music composer. She is an innovator in Bangladeshi popular music and is noted for introducing changes in the pop music arena in her country.