Write SQL query to solve given problem: Which character did the "Outstanding Voice-Over Performance" winner voice?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT DISTINCT T2.character FROM Award AS T1 INNER JOIN Character_Award AS T2 ON T1.award_id = T2.award_id WHERE T1.award = 'Outstanding Voice-Over Performance' AND T1.result = 'Winner';