CREATE TABLE table_14948 ("Code Name" TEXT, "Function  ( figure ) " TEXT, "Real Name" TEXT, "Birthplace" TEXT, "Serial number" TEXT, "Primary military speciality" TEXT, "Secondary military speciality" TEXT)

What is the Serial number for the Space Security Trooper Function (figure)?
SELECT "Serial number" FROM table_14948 WHERE "Function (figure)" = 'space security trooper'
SELECT "Serial number" FROM "table_14948" WHERE "Function (figure)" = 'space security trooper'