step: 20+/30 (40+) | strength: 1-0.8 | cfg scale: 5-4/6-5 | clip skip: 2

For correct anatomy according to the series, use:

khr-colonelloarc, (chibi), 1boy, no hairband, ~~mini_person, solo,~~
- big pacifier necklace, military_uniform, green headband, (01), ~~green jacket, white t-shirt, black belt, green pants, black boots,~~
- weapon:
  - (sniper rifle|weapon on back), oversized weapon,
- bird:
  - white_(big_bird_on_head:2),
khr-colonello, 1boy, blue eyes, no_hairband, ~~aged up, solo,~~
- alternate military uniform, green hairband, ~~white t-shirt, green jacket, (01 on jacket),~~
  optional change: (01 on jacket) -> (01),

Negative prompt: hairband,

Testing done with WAI-NSFW-illustrious-SDXL v11

Recommended↴

Prompt: radiant reflections, rich color tones, deep contrast, ntricate textures, luminous lighting, cinematic ambiance, shimmering gradients, best quality, colorful, masterpiece, ~~ethereal glow,~~

Prompt: ~~radiant reflections, rich color tones, deep contrast,~~ ~~ntricate textures~~~~, luminous lighting, cinematic ambiance, shimmering gradients,~~ masterpiece, best quality, amazing quality, colorful, vibrant, very aesthetic, detailed background, absurdres,

Negative prompt: bar censor, censored, mosaic censoring, bad quality, worst quality, worst detail, normal quality, sketch, censor, simple background, multicolored theme, expressionless, hairband, pixelated, chromatic aberration, blurry, ~~pectorals~~, bad_hands, few detailed, extra_limbs, mutation, mutilation, fewer digits, extra digits, multiple heads, eyelashes, mutation, mutilation, self-harm, extra_legs, extra arms, ~~bara, muscular, muscle, obliques~~, ~~bad anatomy~~, ~~clone, asian, print shirt, print jacket, worst_eyes, depth_of_field, pink lips, lipstick, feminization, female face, female,~~

Notes:

chibi works for both tags with the same result: “khr-colonelloarc”|“khr-colonello”.
"alternative military uniform/military uniform", will carry the complete set, no need to indicate parts of the set.
01 will appear from time to time.
ntricate textures -> intricate textures, (for some reason it works better with the first one).
Chibi
- To make it more correct use the tag: “oversized_object” or “big” in animals
  Example: oversized gun, big bird on head,
  It's better: white_(big_bird_on_head:2) -> 1216*1216
*****
- Works best with upper body/cowboy shot or 1216*1216
- Better to use adetailer for eyes

Colonnello/コロネロ - Multidesign (Katekyo Hitman Reborn!/家庭教師ヒットマンReborn!) - V1