"A Shannan imposter also appears in Fire Emblem: Genealogy of the Holy War during Chapter 9. If Hermina or Jeanne enters the village, he attempts to flirt with her, but she sees through his impersonation, causing him to give her his Dracoshield, which he was trying to pass off as the Balmung. It is unknown whether or not Shannam was intended to be this person."
I think this page should be edited to reflect his appearance in Genealogy of the Holy War. I don't see any reason to treat the characters as separate at all. They have the same concept and personality, and what the article doesn't mention, they also happen to reside in exactly the same place (the bunch of villages in the North West of Chapter 9 are Tahra, where Shannam is first encountered, though not recruited, in Thracia 776). Not treating his cameo in Genealogy of the Holy War as an actual appearance would be like not treating the "girl who looks like Sophia and knows everyone in Arcadia" as Sophia. Oni Dark Link 11:41, May 20, 2018 (UTC)