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Rebecca discards various monsters to her graveyard to power up her [[Shadow Ghoul]] monster, and Yugi concedes defeat. Rebecca demands the card, but Solomon reveals it was destroyed. An angry Rebecca yells at Solomon (unaware that it was really [[Seto Kaiba]] that destroyed it) until Arthur arrives, telling her to behave. He shows Rebecca the card Yugi had drawn, and it is a card that would have weakened her [[Shadow Ghoul]] for Yugi to destroy and win. (the card was [[Soul Release]] which would've allowed Yugi to remove 5 monsters from her [[Graveyard]].) Yugi admits he surrendered on purpose, just as his grandfather did to let Arthur take the supplies. When they were rescued, Arthur was so grateful he gave his Blue-Eyes card to Solomon. After learning about the story, Rebecca quickly apologizes. Yugi gives Rebecca his [[The Ties of Friendship]] as a reminder of this lesson, which she keeps ever since.
[[File:Rebecca 4.PNG|thumb|right|2o0px|Rebecca in Season 4]]
She and her grandfather return in the Orichalcos arc to help Yugi fight [[Dartz]]. Here Rebecca is noticeably older and wearing glasses (to the point that everyone barely recognizes her) and is also in college, much to everyone's shock. She helps by researching Dartz's Three Swordsmen and hacking into [[KaibaCorp|Kaiba Corporation]]'s computer system to track others via their [[Duel Disk]]s. She also seems to be slaving under the delusion that Yugi is her boyfriend (her "darling" in the Japanese version, a reference to ''[[Wikipedia:Urusei Yatsura|Urusei Yatsura]]''), something which makes [[Téa Gardner]] jealous. This doesn't seem to be a pretend crush as she has is devastated when Yugi's soul was taken and tried to defeat [[Valon]] in vengeance, showing she has true feelings for Yugi.
Rebecca also takes part in the [[KC Grand Championship]], where she duels [[Abe the Monkey Man]] and [[Vivian Wong]]. She loses to [[Leon von Schroeder]] in the semi-finals and spends the rests of the tournament cheering from the sidelines. She is absent after the tournament ends, telling Yugi that she will duel him one day and telling Téa (with a coy look) that she will miss Téa.
