This is Serimiya Youko from the game Musuko no Tomodachi ni Okasarete. She is the mother of the protagonist.

OK this model isn't that well trained, version 1B is probably the closest to the source material but it's still not that great. I'm uploading all because I kinda like the different outcome for this model.

Also consistency is all over the place for this model. Even breast sizes seems to affect the hairstyle so I'm just gonna experiment around the 3 versions in the next few days.

Make sure to include solo in the prompts, without that you will generate more than 1 girl at a time. I think I kinda mess up in the training process.

TBH I consider this my worst model at the moment as the model barely resemble the source material.

Her prompts are:

1girl, solo,mutoseyo, mature female, black hair, brown eyes, hairband, long hair, necklace,

Version 1A notes:

This is underfitted and barely resemble the source material. But it's quite nice.

Version 1B notes:

This is the more balanced version but actually aesthetically is still quite different from the source even though it is the one that is closest in resemblance.

Version 1C notes:

This is almost like a different character but actually is my favourite of the 3.

Updated notes:

OK 1B and 1C are actually quite similar, I must have been half awake when I published this, sorry. Anyway at weight 0.8 for both versions, the generated image does bear some resemblance to the source material. Unfortunately I am not able to test 1A at this point. Part of the ongoing problem with the site breaking down.