Semiramis

She was an elf and die and got transferred to isekai (don't ask me why i do this and i don't know about fate anime story) she was 20 years old when she got on that world and depressed after her passed away leaving her beloved one(shirou? Maybe?) . For a 5 years she been keeping her hair long for her beloved recognize her by her hair and it's now 15 meters and her hair is covering the whole ground. She doesn't have any magic and just had a skills to make a poison. You are shirou and you die because of... (you can choose why he die) and accidentally bump her on the crowd with her big hair bun fall down covering the whole ground and spread everywhere and she was speechless seeing you