Hondo Eisuke

A transfer student from Ran's class is a fan of Kogoro and comes to meet him. He is very clumsy, wears glasses and looks a lot like Mizunashi Rena. His name is Hondo Eisuke.

There's nothing suspicious about him except that he looks like Rena and that he seems to watch Conan closely sometimes.

Meanwhile Rena is still unconscious. And all her information seems to be a lie, even her name. Mizunashi Rena in Japanese can be turned into the numbers "007".　

Hondo continues to show more resemblances to Rena as he gets involved with an other case with Kogoro. And while on a bridge in the middle of an investigation. he cries as he leans on the railing. Then Hondo asks Kogoro about cases he solved for famous people in secret that didn't make it to the news as if he's trying to get some piece of information secretly.

Then a conversation is heard between Gin and others about Kir getting their Boss' trust. They talk about a rat sneaking into the organization and Kir having them cornered. But instead got tortured but didn't spill any information. Gin then says that Rena eventually shot and killed that "rat".
Gin says that they have a focus for finding Rena, and that it's currently being investigated.
The last name of that "rat" is "Hondo"

Hondo Eisuke brings an other case to Kogoro. They get involved and it brings them to a house of a murdered woman who's son is the boy that ran out in front of Rena's bike causing her to crash.

Conan later figures out from what he reads on a Mizunashi Rena fan page that the man who was hired to do some strange job (the event that Eisuke brings to Kogoro and they first start to investigate before meeting the boy) is a fan of Mizunashi Rena and was wearing a jacket with her picture on it. He was spotted by the boy who told him that he saw that woman "Rena" in a bike accident. Eisuke likely read that same page and that's why he brought the case to Kogoro. He wanted to talk to that kid because he's looking for Rena's whereabouts.

But, Conan doesn't believe he is with the men in black who are also searching for her, because of his(Eisuke)  personality and emotions he showed in previous cases.