The PPC takes pride in its spotless writing, but Boarders aren't perfect, even when it comes to the names of other Boarders. When a Boarder's name is misspelled, a mini-Boarder is born.
Mini-Boarders have a variety of appearances, but some examples can be seen online, such as Hirilnara's March 2004 drawing of Huinesoron's twins, Hinesoron and Hunesoron.
Agent names are also occasionally misspelled, but there aren't any mini-agents, or at least, there shouldn't be. Since agents are named almost exclusively in PPC mission logs, the proper course of action is not to adopt the mini, but rather to correct the error. The original message board wasn't editable, but PPC missions can always be tweaked and mistakes corrected on the new Board.