Resources used: (bare in mind that I do quite a lot of editing on pictures so you might not get quite the same results)

Photoshop
Stable Diffusion Forge
Model:  indigoVoidFurryFusedXL_noobaiV23

Tails at door: 

Original Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 1367678254, Size: 800x1200, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.36, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 7, Hires upscale: 1.5, Hires upscaler: R-ESRGAN 4x+ Anime6B, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Inpaint Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 1797814061, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Mask blur: 4, Inpaint area: Only masked, Masked area padding: 32, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Positive: 
masterpiece, best quality, amazing quality, male, very aesthetic, high resolution, absurdres, <lora:StS-Illustrious-Detail-Slider-v1.0:3>, inside,
sonic the hedgehog \(series\), Tails the fox, solo, (tall, adult,) male, flat chest, white belly fur, white gloves, smirk, facing viewer, blue eyes, ((muscle)), (Bara), flaccid penis, balls, confident, thick frame, white chest fluff, standing, back against doorframe,

Negative: 
realism, 3D,busty, ugly face, mutated hands, low res, blurry face, black and white, text, human, watermark, chubby, pubic hair, eyelashes, lips, eyelashes, tooth, skirt, ((female)), looking at viewer, ((Breasts)), closed eyes, blush, ceiling light,


Amy reaction: 

Original Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 2300651178, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 7, Hires upscale: 1.5, Hires upscaler: R-ESRGAN 4x+ Anime6B, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Inpaint Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 1115926696, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Mask blur: 4, Inpaint area: Only masked, Masked area padding: 32, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Positive: 
masterpiece, best quality, amazing quality, male, very aesthetic, high resolution, absurdres, <lora:StS-Illustrious-Detail-Slider-v1.0:3>, inside, solo, living room, solo,
sonic the hedgehog \(series\),Amy Rose, standing, white walls, blushing, naked, breasts, nipple, smiling,

Negative: 
realism, 3D,busty, ugly face, mutated hands, low res, blurry face, black and white, text, human, watermark, chubby, pubic hair, eyelashes, lips, tooth, skirt, looking at viewer, closed eyes, blush, ceiling light, reflecting, reflection, blue light, ((window)),


Silver reaction: 

Original Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 242961981, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 7, Hires upscale: 1.5, Hires upscaler: R-ESRGAN 4x+ Anime6B, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Inpaint Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 2187991374, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Mask blur: 4, Inpaint area: Only masked, Masked area padding: 32, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Positive: 
masterpiece, best quality, amazing quality, male, very aesthetic, high resolution, absurdres, <lora:StS-Illustrious-Detail-Slider-v1.0:3>, inside, solo, living room, solo,
sonic the hedgehog \(series\),Silver the Hedgehog, standing, blushing, shy expression, looking to the right, white walls,

Negative: 
realism, 3D,busty, ugly face, mutated hands, low res, blurry face, black and white, text, human, watermark, chubby, pubic hair, eyelashes, lips, tooth, skirt, looking at viewer, closed eyes, blush, ceiling light, reflecting, reflection, blue light, ((window)),


Shadow reaction: 

Original Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 4249425508, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 7, Hires upscale: 1.5, Hires upscaler: R-ESRGAN 4x+ Anime6B, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Inpaint Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 225907898, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Mask blur: 4, Inpaint area: Only masked, Masked area padding: 32, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Positive: 
masterpiece, best quality, amazing quality, male, very aesthetic, high resolution, absurdres, <lora:StS-Illustrious-Detail-Slider-v1.0:3>, inside, solo, living room, solo,
sonic the hedgehog \(series\),Shadow the Hedgehog, standing, crossed arms, annoyed expression,

Negative: 
realism, 3D,busty, ugly face, mutated hands, low res, blurry face, black and white, text, human, watermark, chubby, pubic hair, eyelashes, lips, tooth, skirt, looking at viewer, closed eyes, blush, ceiling light, reflecting, reflection, blue light, ((window)),


Rouge reaction: 

Original Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 2350897302, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 7, Hires upscale: 1.5, Hires upscaler: R-ESRGAN 4x+ Anime6B, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Inpaint Data
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 2240063486, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Mask blur: 4, Inpaint area: Only masked, Masked area padding: 32, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Positive: 
masterpiece, best quality, amazing quality, male, very aesthetic, high resolution, absurdres, <lora:StS-Illustrious-Detail-Slider-v1.0:3>, inside, solo, living room, solo,
sonic the hedgehog \(series\), rouge the bat, bedroom eyes, breasts, nipples, standing,

Negative: 
realism, 3D,busty, ugly face, mutated hands, low res, blurry face, black and white, text, human, watermark, chubby, pubic hair, eyelashes, lips, tooth, skirt, looking at viewer, closed eyes, blush, ceiling light, reflecting, reflection, blue light, ((window)),


Knuckles reaction: 

Original Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 274231409, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 7, Hires upscale: 1.5, Hires upscaler: R-ESRGAN 4x+ Anime6B, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Inpaint Data:
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 216507746, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Mask blur: 4, Inpaint area: Only masked, Masked area padding: 32, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Positive: 
masterpiece, best quality, amazing quality, male, very aesthetic, high resolution, absurdres, <lora:StS-Illustrious-Detail-Slider-v1.0:3>, inside, solo, living room,
sonic the hedgehog \(series\), Knuckles the echidna, tall, adult, smirk,

Negative: 
realism, 3D,busty, ugly face, mutated hands, low res, blurry face, black and white, text, human, watermark, chubby, pubic hair, eyelashes, lips, tooth, skirt, looking at viewer, closed eyes, blush, ceiling light, reflecting, reflection, blue light, ((window)),


Sonic reaction: 

Original Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 1213709022, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 7, Hires upscale: 1.5, Hires upscaler: R-ESRGAN 4x+ Anime6B, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Inpaint Data: 
Steps: 35, Sampler: Euler a, Schedule type: Automatic, CFG scale: 7, Seed: 111436675, Size: 1024x1024, Model hash: 6354c7b0cd, Model: indigoVoidFurryFusedXL_noobaiV23, Denoising strength: 0.3, Clip skip: 2, Mask blur: 4, Inpaint area: Only masked, Masked area padding: 32, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Positive: 
masterpiece, best quality, amazing quality, male, very aesthetic, high resolution, absurdres, <lora:StS-Illustrious-Detail-Slider-v1.0:3>, inside,
sonic the hedgehog \(series\), Sonic the Hedgehog, surprised expression, tall, adult,

Negative: 
realism, 3D,busty, ugly face, mutated hands, low res, blurry face, black and white, text, human, watermark, chubby, pubic hair, eyelashes, lips, tooth, skirt, looking at viewer, closed eyes, blush, ceiling light, reflecting, reflection, blue light, ((window)),