Sunny and Basil from OMORI 4K HD Wallpaper

Two anime-style characters, Sunny and Basil, are shown from the chest up, positioned back-to-back. Sunny, on the right, has black hair and is wearing a black vest over a white shirt, with his mouth open in a shout. Basil, on the left, has blonde hair with a pink flower accessory and is wearing a similar outfit, with a wide, unsettling smile. The background features a swirling vortex of yellow, green, and pink colors.