1. Mana 35 years ago was trying to escape becoming the next Earl of the Millennium (like Allen is now resisting turning into the 14th).
The Lost Fragment Of Snow novel seems to hint Mana was a Noah. His golden eyes get three mentions (including that they’re his “most striking feature”), and sparks fly out when Red’s Innocence hits his head. LFOS also makes two mentions of Mana being like a “puppet” or “doll” (same word in Japanese), and it comes up a couple of times that he’s confused and possibly losing his grip on reality as well (which is also mentioned by Cross in the manga). In chapter 198, remember what Nea said to Allen?