It depends. If the portrayal of the yandere girlfriend is done in an interesting and nuanced way, it could be appealing. But if it's overly stereotypical or one-dimensional, then no.
A gift from her in a yandere manga can have multiple meanings. It could be a sign of the yandere's obsessive love, an attempt to control the situation, or a way to create drama and tension in the story. Sometimes, it might even be a red herring to mislead the reader.
One of the top yandere visual novels is 'Doki Doki Literature Club'. It starts off as a seemingly normal dating sim but takes a dark turn with the yandere elements. Another great one is 'Yandere Simulator', which focuses on the yandere character's actions and her pursuit of the senpai. 'Amnesia: Memories' also has some yandere - like routes that add a unique flavor to the game.
Well, such a girl is often obsessive and possessive. She might go to extreme lengths to keep the person she likes close to her, sometimes even using violence or threats.
There are several options. One could be Comico, which often has a wide range of manga available. Another option is Webtoon, although it's not guaranteed that 'Me and My Yandere Girlfriends' will be there. Sometimes, specific fan forums or communities might also share links, but make sure to follow the rules and be cautious of potential copyright issues.
In yandere x reader fanfics, yanderes usually display intense emotions. Their love for the reader is not the normal kind; it's more of an obsessive love. They may have a dual personality where they can be extremely sweet and loving one moment, but if they feel threatened in their relationship with the reader, they can turn very dangerous and menacing.
I'm not sure exactly as I haven't read it. But 'yandere' usually refers to a character who is initially very loving and gentle but can become extremely possessive and violent. Maybe it's about a father with such traits being teased in the story.