Continuing on the quest to generate ever smaller girls, I arrive at... *squints*... what appears to be someone embedded in a water droplet on top of some sort of rugged surface; a leaf, maybe?
As a slight note; The prompt will very likely not generate the exact same image. I slightly edited another version and this was a variation from that edited version.
Too bad I can't produce a male at all.๐ข๐ข๐ข
Sorry, this image was generated using not only prompt, but also "img2img". First I uploaded an image such as "1 girl image" generated by myself or favoirite images found in Danbooru. Secondary I modified it using 'Edit Image'. For example, I added a shadow looking like a man's silhouette. And then I generated images with Strength 5~7, repeated several times to complete it. As you said, "1boy" frequently disappears... but if you use 'Edit Image', he might show up.
Too bad I can't produce a male at all.๐ข๐ข๐ข
Adding onto @x_u's comment, if you're using novelai, then try using 1 boy and use the curly brackets "{ }" on it. They add more strength to whatever tag(s), sentences, or descriptors they're used on. It's especially good for things that have trouble generating so you can "force" it to hopefully get the desired result.