The Seven Deadly Sins Theory: Is Gowther a Doll or Demon?

( FOR FANS THAT HAVEN'T GONE FAR IN THE MANGA)

Hi! This is a theory on whether Gowther is a doll or a demon. I  recently discover a debate on the Nanatsu No Taizai Wiki debating whether Gowther is a doll or a demon. Now I know that hardcore fans already know the answer, but for those that haven't gone that far in the manga, here is a theory for you. So my theory is that Gowther is a doll. This is the most likely result because Meliodas obviously has emotion and feelings. As I said in a past theory, Meliodas was a demon, or at least had some demon blood in him from birth. ( Helbram says this in Episode 13: Bloodcurdling Cannon) So saying that Gowther is a demon wouldn't make since because Gowther has no emotion or feeling, so Gowther has to be a doll. http://nanatsu-no-taizai.wikia.com/wiki/Nanatsu_no_Taizai_Wiki    

The Seven Deadly Sins Merlin Theory- Did She Want To Be More Powerful Than Meliodas?

NOTICE: Major spoilers for The Seven Deadly Sins ( Netflix Anime Series ) Also I will not focus much on the manga.

My Merlin Theory

Merlin is the Boar sin of Gluttony. She is the Britannia's greatest sorcerer. But did she want all the power she could get? My theory is that she purposely put Meliodas in a dungeon to take power from him. If this is right she might have been experimenting on things since Meliodas said that's where he met Hawk. After all Hawk is a talking pig. Maybe she knew Hendrickson and Dreyfus were gonna kill Zaratras so she told the Holy Knights to go outside Zaratras' room  and planned the whole thing? In the manga Meliodas says " Who would do something so gruesome?! And why they target the Captain of the Holy Knights?!" So if my theory is correct Merlin knew Hendrickson and Dreyfus were going to kill Zaratras so she had all the Holy Knights be outside his room at the same time so when all of the seven deadly sins went in Zaratras' room it would like they killed him. Then Merlin took out Meliodas, looking innocent and placed him in her dungeon. then she left him there and with all The Seven Deadly Sins split up went to Camelot to serve King Arthur  and the king before that. Then after getting good reputation and hearing rumors that The Seven Deadly Sins were getting back together she went back to Liones. She purposely made King Liones sick so King Arthur would have a reason to go to Liones with her. After that she joined The Seven Deadly Sins again hoping that past Holy Knights would forget.