Pegasus for the "send me a character" thing, because I'm predictable. Or Yugi. :)
Send a character’s name to receive four different headcanons
Headcanon A: The island in which he hosted Duelist Kingdom on was one of the Crawford properties that he inherited. When growing up, it was a summer vacation home. Pegasus continued to use it as a summer vacation home for his adopted kids, and once having caught the kids dueling on one of the castle turrets inspired the concept of the Duelist Kingdom Tournament.
Headcanon B: Upon finding the first Kuriboh tablet in the ruins, Pegasus though while it was a strange monster, it was rather cute. However, his endearment for the creature quickly diminished when he found literally hundreds of rocks and broken tablets littered everywhere in the temple he found the first one in. By the end of the overall dig, at least 500 different rocks and tablets with the kuriboh image on it, some coming from different temples.
Headcanon C: After Duelist Kingdom, and recovering from his eye injury, Pegasus had to do some serious soul searching on what to do from that point forward. In the end, he had to come to the most difficult reality for himself: that she was gone and unable to come back, and come to terms with this reality. The Millennium Eye, for all it’s wonder and power it granted him, had lead him to believe that the impossible was in fact obtainable, but had also made him lose sight of the closure he was trying to avoid.
Headcanon D: Upon hearing that Kaiba got married and was expecting his first child, Pegasus might have sent the expecting father a “care kit” for the first week with the baby. While it contained baby clothes and toys, most of them were Toon themed. Kaiba threw out the clothes and put the toys elsewhere, and much to his horror, his baby loved the BETD plush. Pegasus, on the other hand, was delighted when he heard through the grape vine of this development!