You can find various 1366x768 options on HDQWalls and Peakpx , which feature her in different skins and action poses.
Here are the best sources for these specific characters and resolutions: Download 1366x768 Arknights, Hoshiguma, Horn, G...
For dual-character art, AlphaCoders offers high-resolution downloads that can be cropped or scaled to 1366x768. You can find various 1366x768 options on HDQWalls
Sites like HDWallpapers and Mob.org provide categorized galleries where you can select the 1366x768 resolution directly before downloading. Download 1366x768 Arknights, Hoshiguma, Horn, G...
You can find and download high-quality Arknights wallpapers featuring Hoshiguma and other operators through several specialized wallpaper platforms.