Chibi_Protector
She was brought to the wammy house just as L turned 18, having a 4 year old being held in the same rank has he was was a total shock to all. Though she had sadly watched her parents being murdered, she will never let anyone know, Her alias already running through the internet like a storm, L took her along with him to help with cases most adults would fear. Unlike those adults, she will walk up to the case with a smile and confidence, over protective for a 4 year old, making sure L doesn't make any dumb or risky moves she will stop smiling and be blunt in a serious tone, and most the time L will listen and work with the adorable girl. She's like a daughter to L, and when the Kira case begins, she's a sweet little ten year old, too smart to even bother with classes. She's basically L's daughter, she's just his little helper.