Maybe tk would choose his brother as the best man. They've shared a lot of experiences growing up, and his brother would be really supportive. For Kari, her best friend from childhood could be the maid of honor. This friend has been there for all of Kari's important moments and would be honored to stand by her side on her wedding day.
One common theme could be the adjustment to married life. How they deal with daily routines, finances, and family together.
Well, clearly Kari and TK are the main characters since it's about them being married. But other important characters could be their Digimon partners. For example, Gatomon might be there to offer Kari advice on married life, and Patamon could be TK's sidekick, getting into all sorts of fun and sometimes troublesome situations.
I'm not sure exactly which 'tk and kari married' fanfiction is out there. You could try searching on fanfiction websites like Archive of Our Own or FanFiction.net. Just type in 'tk and kari married' in their search bars and see what comes up.
One possible plot could be Kari and TK navigating through their new married life while also dealing with the challenges of their Digimon partners still being a part of their world. Maybe they have to balance their personal time together with the responsibilities of helping their Digimon in battles or other situations.
In this fanfiction, Tien could be Krillin's best man. Tien is a very loyal friend and his serious nature could add some stability to the wedding party. As for 18, Videl could be the maid of honor. Videl is young and energetic and could bring a lot of fun to the pre - wedding and wedding day events, while also being a good friend to 18.
For the best man, it could be Kirishima. He's one of Deku's closest friends and his manly nature would make him a great support during the wedding. As for the maid of honor, Mina would be a good choice. She's Momo's friend and her energetic and fun - loving personality would add a lot of charm to the wedding preparations and the event itself.
Well, it could be really interesting if Peter was the best man in a sort of ironic way. He has a complex relationship with Derek, but he could also bring some drama and humor to the role. For the maid of honor, perhaps Allison could be brought back in a supernatural way. She was an important part of their lives before, and her presence as the maid of honor could be a very emotional and nostalgic addition to the wedding in the fanfiction.
Maybe Jason could be Percy's best man. They've had their own adventures together and Jason respects Percy a great deal. As for Thalia, Piper could be her maid of honor. Piper is kind - hearted and has a good sense of style, which would be great for helping Thalia with the wedding details and being there for her on her big day.
Maybe in the fanfiction, Logan's older brother is the best man. He has always been like a role model to Logan, and it would mean a lot to have him there. For Rory, Paris could be the maid of honor. Despite their sometimes - rocky relationship, Paris has always respected and cared for Rory in her own way, and she would be a fierce supporter on Rory's big day.
Well, the best man might be Wally West. He and Nightwing are really close friends, and Wally's sense of humor would add some fun to the wedding. Regarding the maid of honor, perhaps Koriand'r's sister, if she has one in the fanfiction world. She would know Starfire well and could help her with all the wedding preparations and be by her side throughout the day.