Pic 1
<lora:knuckles_1.5_v1:1> knuckles_the_echidna, butt, cute ass, ass focus, detailed ass, detailed anus, small balls, detailed balls, penis, red fur, solo, (naked:1.2), detailed body, young, teenager, 8k, 4k, hi res, ultra detailed, small tail, (ass focus, anus focus:1.2), <lora:glory_wall:1> glory wall, through wall, stationary restraints, procedural,
Negative prompt: blurry, bad quality, low quality, deformities, smile, sun, light, muscule, deformed, doors, full body, erection, easynegative, boring_e621_v4

Pic 2
+ (black hose, object insertion, anal object insertion:1.3),

Pic 3
+ (buttplug, object insertion, anal object insertion:1.3),

Pic 4
+ (anal beads, object insertion, anal object insertion:1.3),

Pic 5
(green dildo, object insertion, anal object insertion:1.3),

(+ Photoshop, Img2img, inpaint)