Enfin, non, j'ai parlé sans réfléchir.
Despite fan rumors, the cloaked woman who appears at the end of the manga is not Misa, but an unnamed follower of Kira. Misa's fate is not shown in the manga at all; she was last seen staying at the Teito Hotel. Ohba stated that this was simply because he did not have a situation to fit her in.
(Wikipedia)
According to How to Read 13, Her memory from the incident and the Death Note is erased, yet she still retains her love for Light. She is not brought to justice for her crimes, having no memory of ever committing them. Misa falls into despair after learning of Light's death through someone "like Matsuda." Misa commits suicide one year later on February 14, 2011 (ironically, Valentine's Day). It is also revealed that the cloaked woman who appears at the end of the manga is not Misa, but simply a follower of Kira.
(Death Note wiki)
En gros, ce n'est pas elle et la boutique kamehashop s'est juste gourée. Beaucoup de fans croient à tort que c'est elle alors que ce n'est pas elle.