| Mokuba is Kaiba's brother. They are very close and always trusts his brother. They both were put up for adoption. And Seto would not leave with out him. One day a famous chess player came to the Adoption home. Seto challenged him with one condition if he one he had to adopt him and brother Mokuba. Seto one and was adopted by the Kaiba's which is the reason he is rich. He will always help his brother and visa-versa. He is only loyal to Seto and always belives in him. He is taken prisonier in the shadow realm by Pegasus to lure Kaiba to duel him. Kaiba looses and he is traped as well. And Yugi rescues both of them. |
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