A sister-in-law referred to her husband's younger sister. Among the relatives, the husband's sister was called sister-in-law. In some places, she was also called a granny. His sister-in-law's partner was called his sister-in-law. The relationship between sister-in-law and sister-in-law was called sister-in-law.
Sister Devil Manga was an original manga created by Iida Shiki. The story told the story of the siblings after the protagonist met the demon. The manga was serialised in Kadokawa Bookstore's "Electric Shock G's Comic" and was published by the same name. Sister Devil's manga was still in the midst of being serialised, and the author was Iida Shiki. The latest chapters and complete works of Sister Devil's manga can be found online on the relevant websites.
I'm not sure. It depends on the specific manga you're referring to. There could be various plot developments and character relationships that determine who it is.
Sister Lover was a Japanese manga about the love story between the protagonist and his half-sister. The ending of the manga had not been decided yet because the storyline had not yet ended. Some readers and the media speculated that the manga might usher in a happy ending where the protagonist and his half-sister could find their own happiness. However, these speculations were just speculations. The details of the ending of the manga would only be known after the work was completed.
Another way is to make her write an apology letter if she has hurt someone's feelings. This helps her reflect on her actions. For instance, if she said something unkind to a friend, writing a sincere apology letter would make her realize the impact of her words and also improve her communication skills in the long run.
There could be a mysterious old neighbor. This neighbor might have some knowledge about magic or strange phenomena. When the little sister shrinks, the neighbor could offer some clues or tools to help her return to her normal size. Maybe the neighbor has had a similar experience in the past and can guide the little sister through her ordeal.
The parents would be important characters. They could have different reactions. Maybe the father is more accepting and tries to teach the giantess little sister how to use her new power for good, while the mother is initially worried about how society will view their daughter. Their relationship with the little sister and how they deal with the situation can be a big part of the story.
"The Substitute Junior Sister Is a Gentle Green Tea Spirit","Qingyun's Afterword","Senior Sister Bai Yueguang and the Substitute Junior Sister","The Substitute Junior Sister Resigned","The Substitute Junior Sister Dressed as a Substitute Junior Sister","The Nine Senior Brothers Regret After the Substitute Junior Sister Reincarnated","What's Wrong With the Substitute Junior Sister?","The Substitute Junior Sister Resigned After Reincarnating","The latest chapter of the Substitute Junior Sister Dressed as a Substitute is not available online.""The latest chapter of the substitute junior sister (Wen Beiyu)" and other novels were all recommendations about the little junior sister being a substitute.