well for me, Allen's face is much look alike with Shindou Hikaru from Hikago.
His special arm and his first appearance cloak reminds me of Edward Elric from
Hagaren. His special eye that noticing akuma in one look reminds me of
Shinigami's eyes in Death Note.
Like it though Allen's cute and yet he looks cool in v.6 xDxD
yup, i do.
just gotten into it recently! 
well for me, Allen's face is much look alike with Shindou Hikaru from Hikago. His special arm and his first appearance cloak reminds me of Edward Elric from Hagaren. His special eye that noticing akuma in one look reminds me of Shinigami's eyes in Death Note.
Like it though Allen's cute and yet he looks cool in v.6 xDxD