- Name: Niibo Sumire (新穂純麗)
- Nickname: Suu-chan (すーちゃん)
- Birthday: October 28, 1996
- Birthplace: Kagoshima, Japan
- Zodiac: Scorpio
- Height: 153cm
- Blood Type: A
- Member Color: (Mikansei Lip Sparkle) Red
Niibo Sumire joined S☆UTHERN CROSS under the name Sumire (すみれ) with the 2nd Generation on March 25, 2012.
On February 23, 2013 she graduated from S☆UTHERN CROSS alongside her older sister Kishiro, who had been part of the group since the 1st Generation.
On March 10, 2015 she announced that she had signed with Alice Project. The formation of the group Nazodol was announced on April 11 and Sumire was a member, though her identity was undisclosed at the time. On May 3 Nazodol was renamed Enta no Jikan and the members were revealed. However, their disbandment and the departure of all members from Alice Project was announced on August 16, and their final live at Harajuku Astro Hall was held on October 10.
On December 15, 2015 Sumire was announced as one of the founding members of Mikansei Lip Sparkle.