In order of appearance: (click on the thumbnail for a larger picture)
Shinjyou Kurumi
新城・くるみ
An innocent who was deeply involved in one of Krypton Brand's missions. May appear to be your typical damsel-in-distress; still, does not trust too easily, and seems to have quite a strong sense of self-preservation.
[spoilers]
Kurumi's parents were involved in the manufacture of a dangerous drug known as Human Interleukin III - a drug which Kurumi later discovered was being carried in her bloodstream, during a tense showdown with the bosses of the company who had overseen this manufacture. Her parents were killed in the conclusion of said mission - Kurumi was offered the choice of becoming part of Kripton Brand or being killed, and chose to stay on at the flowershop.
Mihirogi Nana
三尋木・ナナ
An agent of the organization Krypton Brand. Enigmatic but relatively to-the-point, she briefs Krypton Brand Side B on missions, and takes part in mission planning and co-ordination. She seems to have a good understanding of the team members' psyches, and can hold her own in a combat situation.
[spoilers]
She was originally secretary to Takatori Shuuichi, but joined Nakatsugawa Kyousuke because her ideals conflicted with Shuuichi's. Nakatsugawa was CEO of the Bank of Japan, second-in-command under Saijou Takatori and had ties with the Second Weiss ( Shion, Azami, Ayame and Rindou ) - but when Shuuichi inherited the position of Persia, Nakatsugawa left Kritiker and went on to form his own killing corps, La Mort. See the Dramatic Precious albums for info on Nakatsugawa Kyosuke. After Nakatsugawa's death at the hands of Second Weiss, Mihirogi left Japan and eventually found her way into England's Krypton Brand.
Richard Kripton
Head of the organization Krypton Brand. Seems idealistic and perhaps a bit condescending - considering the power he has, though, that might not be unexpected.