The heartbroken toddler brother of a 7-month-old shot dead in a stroller is “asking for his sister” a week after the senseless murder, Brooklyn prosecutors said Tuesday. The 2-year-old brother of slain baby Kaori Patterson-Moore, who was also grazed by a bullet as a pair of moped-riding thugs opened fire on April 1, is on the mend but struggling to recover emotionally along with a surviving sister, Brooklyn District Attorney Eric Gonzalez told reporters at a press conference.