She's the mother of [Kaito Kuroba](https://anilist.co/character/1747/Kaito-Kuroba). In the TV special she was away in Las Vegas at the time and in a video message to her son said that she knew he'd probably "be very busy very soon", implying that she knew about Toichi's secret room, his identity, and that Kaito would likely become Kid. 

~!In Detective Conan chapter 733, it was revealed that Chikage was once a phantom thief herself known as Phantom Lady. A background story of this is revealed in two new Magic Kaito chapters, which included Toichi's first heist. In it, Chikage met Kid who then saved her life and fell in love with her. She mentions about this later, which sets the stage for the chapter. According to Sonoko Suzuki during the Ryoma heist, she was the great thief known as the Showa Era's woman of twenty faces. She wore horror make up and was very popular for only targeting large companies and very rich individuals with unscrupulous earnings. !~

Kaito Kuroba, a normal teenage student whose father is often absent. When his father dies under mysterious circumstances, he is made aware of his father's secret identity; a famous international criminal known as International Criminal 1412: the Phantom Thief, and that he was murdered by a mysterious organization for refusing to aid them in retrieving the "Pandora Gem"; a mystical stone said to shed a "tear" during the passing of a particular comet (often called the 'Volley Comet'), the consumption of which bestows immortality. 
 
He vows to prevent the organization from gaining immortality, and assumes his father's identity as he begins his quest for the gem. His only clues as to the gem's location are that it glows red under the full moon and that it is a doublet: a gem hidden within a larger gem. Thus, it would have to be a relatively large one with a bizarre history, and always stored in a place that never receives moonlight. He thus researches and steals famous priceless gems with odd histories from incredibly well-defended areas, and always returns them after the very next full moon.

__Birth name:__ Michie Tomizawa
__Hometown:__ Nagano, Japan (born), Takasaki, Gunma, Japan (raised)  
__Favorites:__ melon, watermelon  
__Hobbies:__ Golf, Jazz, Dancing, Shopping  
__Skills & Abilities:__ jazz dance, speaks English, stage fighting

Kaito wants to become a magician like his father. But 8 years after his father's death, Kaito discovers his biggest secret!
 
He was the famous Phantom Thief... and he was murdered! Who is the murderer?! To find out, he puts on his father's suit... and brings Phantom Thief Kid back to life!
 
(Source: Kana, translated)

Chikage Kuroba