H'OKAY so. I am Jen, one of your frandly mods, and player of these three (so far):
This journal is Charlie Weasley, who is mostly obsessed with dragons and also quidditch and maybe a little bit with Oliver Wood. He wouldn't have known either of yours through school, sadly, and probably doesn't know them socially either.
Remus Lupin (hellboundwolf) was in Mafalda's year, and idk if she was anti-werewolf as well as being pro-Voldie, but I don't see them getting on, somehow ;) Likewise, he probably doesn't know Elladora either.
Pansy Parkinson (shouldbeme) again wouldn't know them through school, but is a little bit of Mafalda's way of thinking. And is also determined to get Evan Rosier to marry her because money. So. That will be eeeeenteresting. ;)