Maybe in this fanfiction she experiences a great loss, like the death of a loved one in a very tragic way. For example, if Ron or Harry were killed in a battle and she blamed herself for not being able to prevent it. This overwhelming guilt could be a reason for her to try to kill herself.
It could be related to her identity. If she discovers some dark secret about her family or her magical heritage that she can't bear, such as being related to a dark wizard in some way that goes against everything she believes in. This self - loathing might cause her to attempt suicide.
In some cases, she could save herself in the end. Through a moment of self - realization, she might find the strength within herself to face her problems. Maybe she has a vision of a better future or remembers the love and support she has from her friends and family, and decides not to go through with it.
In some fanfictions, it might be due to a broken relationship. For example, if something goes terribly wrong between her and Ron or Harry, she could sink into a deep depression and see no way out. She may feel that she has lost the most important people in her life and can't bear the emotional pain.
Often, in such stories, the woman might have underlying mental health issues that are exacerbated by the pregnancy. Or, she could be dealing with a traumatic event related to the pregnancy itself, like a health complication for her or the baby.
One possible reason could be jealousy. Maybe she sees Harry getting too much attention or having relationships with other characters that make her feel left out and envious, which then turns into hatred and a desire to kill. Another reason might be a misunderstanding. Harry could be involved in some secret mission or activity that Ginny misinterprets as something harmful, leading her to think he's a threat.
One important ethical consideration is the potential impact on the readers. Depicting such a serious and dark topic like suicide attempts can be triggering for some. Also, it should not glorify or romanticize the act. Fanfiction often has a wide audience, and writers have a responsibility to handle sensitive topics with care.
If in a Sasuke fanfic, one possible reason could be unrequited love. If Sakura feels that Sasuke will never return her love and she has exhausted all hope, she might sink into despair. Another reason could be if she feels she has failed Sasuke in some way, like not being able to protect him or help him in his goals. Maybe she blames herself for his continued pain or suffering and sees no way out but to end her own life.
One reason could be pure hatred. Bellatrix despises Muggle - borns, and Hermione being a very intelligent and powerful Muggle - born would be a prime target for her wrath. Another could be jealousy. Hermione's skills and knowledge might make Bellatrix feel inferior, leading her to lash out.
Another reason could be related to a prophecy. If there was a prophecy in the fanfiction that Naruto would bring great destruction in the future, and Kushina, being a self - sacrificing mother, might think that killing him is the only way to prevent that destruction, even though it goes against her natural love for her son.
One possible reason could be his overwhelming guilt. Snape had a complex past, being involved in the Death Eaters and then switching sides. He might have felt that he could never truly be redeemed, especially with all the lives lost during the wizarding war that he had some part in, whether directly or indirectly. This guilt could have driven him to such a desperate act.
One possible reason could be a misunderstanding. Maybe she was misled by false information about Naruto being a threat to the village. Another reason might be that she was under some kind of mind control. In some fanfictions, dark magic or evil entities can take over a character's mind and make them act out of character.