characters I THINK should be (but aren't or I don't know if are) aromantic or on the aromantic spectrum: 

Katniss from The Hunger Games

Johanna from The Hunger Games

Pidge from Voltron 

Zuko from Avatar the Last Airbender 

Yurio from Yuri on Ice 

Otabek  from Yuri on Ice

Mulan from Disney's Mulan 

Merida from Disney's Brave 

Rey from Star Wars: The Force Awakens 

Elphaba from Wicked

Wonder Woman from DC Comics

Hawkeye from Marvel Comics

Batman from DC Comics

Nozaki from Gekkan Shoujo Nozaki-kun

Rize from Tokyo Ghoul

Akaashi from Haikyuu

there's more but that's all I can think of for now

ping ping ping