Grass Wonder (Rock-piercing Blue)

Grass Wonder (Rock-piercing Blue) is a 2★ character in Umamusume: Pretty Derby, titled “Grass Wonder (Original)”.

Grass Wonder (Rock-piercing Blue) was released on June 26, 2025. They were introduced alongside Winning Ticket (Go To Winning!), Silence Suzuka (Silent Innocence), Special Week (Special Dreamer), Tokai Teio (Top of Joyful), Maruzensky (Rouge Formula), Oguri Cap (Starlight Beat), Gold Ship (Red Strife), Vodka (Wild Top Gear), Daiwa Scarlet (Top of Blue), Taiki Shuttle (Wild Frontier), King Halo (King of Emeralds), Mejiro McQueen (Elegance Line), El Condor Pasa (El ☆ Numero 1), TM Opera O (O Sole So), Symboli Rudolf (Road of Emperor), Air Groove (Empress Road), Mayano Top Gun (Scramble ☆ Zone), Mejiro Ryan (Straight Line), Rice Shower (Rose Dream), Agnes Tachyon (Tach-nology), Sakura Bakushin O (Sakura, Forward!), Super Creek (Murmuring Stream), Haru Urara (Uraran First Prize ♪), Matikanefukukitaru (Rising Luck ☆ Flood of Happiness), Nice Nature (Poinsettia Ribbon), suggesting they were part of the same content update.