I've noticed a few duplicates, I'll list them here:

Fate/Zero:

Irisviel von Einzbern/Artoria Pendragon | Saber (F/Z) and Irisviel von Einzbern/Artoria Pendragon | Saber (Fate/Zero) are duplicates

Haikyuu!!:

Iwaizumi Hajime/Oikawa Tooru (Haikyuu) and Iwaizumi Hajime/Oikawa Tooru are duplicates

SK8 The Infinity:

Nanjo Kojiro | Joe/Sakurayashiki Kaoru | Cherry Blossom (SK8) and Nanjo Kojiro | Joe/Sakurayashiki Kaoru | Cherry Blossom (SNK) are duplicates

Star Wars: The Clone Wars:

Bail Organa/Breha Organa/Obi-Wan Kenobi (SWCW) and Bail Organa/Breha Organa/Obi-Wan Kenobi (SWTCW) are duplicates