※This contains some of my personal oppinion. this is not an Official setting. just for reference.

Q.What kind of sound Sergal makes?
A.Since they have some similarity with avians, they sounds like Chocobo. In Japan, they sounds like 'Kweh' or 'Queh'. but English, it's Wark. ... queck or wark. anyway. so they can manipulate voice like parrot, they can speak.

Q.Where is Talyxian's nostrils?
A.It depends on individual. some has in their mouth, some has around their neck, that looks like a gill (but not an actual gill). Talyxian has so many individuality. that's why they are so difficult to design >_>

Q.Is she(mick) doing fine?
A. A lot better. she draw pics and uploading on patreon, It would be helpful for supporting her. Mick39's patreon page
she still seems suffering with atopy-thingy...

Q.Does Talyxian can speak without opening their mouth?
A.Yes they can. imagine cat's purring. similar like that

Q.Is that a chest fluff? or breastbone(sternum)? This things
A.It's breastbone. that's why some armor has pointed out on their chest
these are very good examples

Sergal anatomy sketch : http://i.imgur.com/1ZxhTfD.jpg
Nevrean anatomy sketch : http://i.imgur.com/Ij3GYVC.jpg ( scanned : http://i.imgur.com/LB4M5ca.png )

Q.What does she plan for Vilous in terms of publishment, a game, a manga, a novel, a show?
A.Mick is planning about Vilous manga with  kiki-uma slowly. she also wants to make Vilous game but busy to earn money, no time for study programming, modeling, learning english, etc...

She seems well but i couldn't bother her all day. so i couldn't ask all the questions. sorry if this is not enough for you guys ;~;
Most questions about anatomy and history stuffs are not setted yet or not decided yet.

Hope this data help you guys U_U and i will upload about some sketch from mick