There are many characters that fans want to see more of, either because they made a huge impression, are fun to watch, or have a lot of potential to expand the story. Nazarick and the other kingdoms have many residents, but hopefully everyone will have some well-deserved time in the spotlight.
Of all the members of Ainz's old guild, Ainz seemed to hold Touch Me in the highest regard. Touch Me was a player in YGGDRASIL who had a strong sense of justice. He would rush in to protect those in trouble without thinking, and would berate those who did something morally wrong.
Touch Me was also the one who saved Ainz back when they were both in the game. He has only been seen through memories, but it would be nice to see Ainz finally reunite with a close friend.