a monochrome manga by tsutomu nihei, multiple girls, long hair, short hair, 4girls, looking at viewer
The image is a digital drawing composed of four distinct anime-style portraits, arranged in a collage format with a black background. 

1. Top left: A black-and-white drawing of a character with short, dark hair and a serious expression. They have sharp, almond-shaped eyes and a slightly upturned mouth. The character's face is slightly tilted, giving a sense of contemplation or intensity.

2. Top right: A vibrant, full-color portrait of a character with striking blue skin and piercing golden eyes. The character has a short, bob-style haircut and a serene, contemplative expression. The background transitions from black to a gradient of pink and purple hues, adding a dramatic effect.

3. Bottom left: A monochromatic illustration of a character with long, straight, platinum blonde hair and a stern, determined expression. They have a prominent nose and sharp, slightly downturned eyes. The character's face is detailed with fine lines and a subtle, mechanical texture, suggesting a cyborg or futuristic design.

4. Bottom right: Another monochromatic portrait of a character with long, dark hair that blends into their mechanical body. They have large, expressive eyes and a gentle, somewhat melancholic expression. The character's face is adorned with intricate, mechanical features, including a small, glowing blue eye and, multiple girls, long hair, short hair, 4girls, looking at viewer, breasts, a monochrome manga by tsutomu nihei