I can't tell if the character in pic is Allen or Riliane. It seems the author is playing with the ambiguity of which one could it be because Hmniao added the tags for both songs, but ommited the tags for Rin or Len. For that reason I'm gonna do the same that has been done with the Undertale's pics for Frisk and Chara, I will add the tags both characters and I won't add the gender tags.