 If you liked
Shin Kidou Senki Gundam Wing
|
 ...then you might like
Fate/Zero
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Emiya Kiritsugu is similar to Heero Yuy as well as Irisviel to Relena. Characters in both shows shed blood for their desires such as peace, greed, etc. Fate Zero however is much more darker and has horror and deals with sorcery and warriors whereas Gundam Wing deals with mecha and a modern tone. There's a sense of pacifism in Fate Zero other than in Wing.