A 3D model and mesh of a humanoid monster combining Warhammer 40k's dark, grim-fantasy aesthetic with the iconic features of Ernie from Sesame Street. The creature should have Ernie's distinctive round head and striped elements twisted into a sinister, biomechanical form. Incorporate gothic armor, jagged edges, and bleak textures, blending Ernie’s cheerful traits with a foreboding, chaotic presence suitable for a Warhammer universe.