Why does Kidd the Thief always protect Conan Shinichi ?

Because Kidd stole because of his father's death.

His father was the real "Thief 1412", but he was assassinated, but no one but Kidd knew about it.

In order to find out the ** who killed his father, Kidd hid his identity and dressed up as his father to lead out **.

Kidd's identity is actually: Kuroba Kaito, his father and Shinichi's father, who are both enemies and friends.

Kidd knows Conan's identity, but Conan doesn't know Kidd's identity and always opposes him, and Kidd doesn't actually want to go against Conan (Shinichi).

Because Kudo Yusaku is the godfather of the monster thief Kidd, Conan (Shinichi) can also be regarded as half of the brother of the monster thief Kidd, and the black feather thief Kidd (the father of the monster thief Kidd) was killed by the black organization and has a common enemy with Conan.

looks so similar, the brains are so good, and the motor nerves are so developed, maybe there is a blood relationship. Hehehehehe.

Mutual restraint is a wonderful life with opponents, and invincibility is lonely.

Well, there are three points.

They long think o they are related by blood

And they have telepathy o understand it

Because Kidd the thief sees Shinichi as a competitor.

When is the mandarin duck hugging each other, the ducks are watching the excitement on the side!!

Opponents always have a pity, so it's no surprise.

I don't want to lose my best opponent!

Because the two of them are glass ......

Or it's ...... sympathy

1.Detectives and strange thieves are fateful opponents, as a detective Kudo Shinichi and as a strange thief, Black Feather Kaito, naturally inseparable from this relationship, just like a police officer and a thief.

2.In the words of Gray Hara's mourning, Conan was described when he encountered the kid case, "with an excited face, like a child who received a gift." I can't wait to open the gift box and see what's inside."

So Conan is not actually hostile to KID, for Conan, KID is a very rare, worthy of cherishing and looking forward to the opponent, always hoping to compete with him.

3.When Conan was in trouble, Kidd the Monster Thief would often come to his aid, and Conan would sometimes worry about Kid. So in addition to being rivals, they are also like friends.

4.The name "Monster Thief Kid" was born when Kudo Shinichi's father, Yusaku Kudo, misread the abbreviated "1412" (TV

473 "Kudo Shinichi's Adventures as a Teenager (Part II)") In other words, Kudo Yusaku is the father of KID's naming (but there has never been a plot where Yusaku named Kuroba Kaito, nor did it say that Yusaku was Kaito's "father"), and Kurobi once said to Kudo Shinichi, who was 7 years old at the time, "I am your brother......No, to be precise, I'm your brother....”（tv

472, but this is just a witty statement that Thief One thanked Yusaku) So in a way, Thief One and Kudo Yusaku's son Kudo Shinichi can be counted as brothers.

5.Kudo Shinichi and Kuroba Kaito look exactly the same, some people think that they just look like each other in the real world, but they don't look like each other in the plot setting, but in fact they are not. From the time of Kuroba Kaito's first appearance in "Detective Conan" (TV

76), Xiaolan mistook Kuaito for Shinichi's plot, and she can know that in the comic plot set by the author, these two people are indeed very similar.

6.Some people think that Kudo Shinichi's father, Kudo Yusaku, and Kuroba Kaito's father, Kuroba Thief, are brothers, saying that Kuto is Shinichi's cousin. But there is no basis for this claim at present.

In the current plot, the only thing mentioned in the current plot is Kuroba Kaito's father, Kuroba Thief, Kudo Shinichi's mother, Kudo Yukiko's master in terms of disguise, and Kuroba Kaito's mother, Kuroba Chikage, is a fan of Kudo Shinichi's father, Yusaku Kudo. As for whether the Black Feather Thief and Kudo Yusaku are brothers, it is not mentioned at all in the plot. And in the plot, Yusaku and Thief are just detectives and strange thieves, and there is no plot narrative that Thief and Yusaku are good friends.

7.There are also those who believe that Kuroba Kaito and Kudo Shinichi are twin brothers who have been separated since childhood, and grew up in different families. Perhaps this does explain why Kaito and Shinichi look exactly the same, but in fact, there is no mention in the original plot that Shinichi and Kaito are twin brothers.