Five things from my head canon.
1. Fujiko is the only daughter of a billionaire tycoon in Japan. Her mother died when she was very young.
2. She ran away from home at eighteen, her father never even looked for her.
3. She learned everything she could from the men she met. She learned along the way not to fall in love with any of them. They used her for her body and threw her away. Now, she treats all men the same way. Easier then getting attached.
4. She got attached to Brad and he died. She was devastated.
5. She often fears Lupin will go the same route some day and so always keeps him at arms length. Never letting him know her true feelings. IN her experience, he probably wouldn't care much about her feelings, she thinks this of most men.
2. She ran away from home at eighteen, her father never even looked for her.
3. She learned everything she could from the men she met. She learned along the way not to fall in love with any of them. They used her for her body and threw her away. Now, she treats all men the same way. Easier then getting attached.
4. She got attached to Brad and he died. She was devastated.
5. She often fears Lupin will go the same route some day and so always keeps him at arms length. Never letting him know her true feelings. IN her experience, he probably wouldn't care much about her feelings, she thinks this of most men.