The whole deck is pretty much exclusively Fiend-type monsters in a "horror" theme with "dark contracts" but Akaba Reiji isn't at all a bad guy or sinister or anything. The only coherence is that he is "serious" and "calculated" which the art and playstyle of the archetype correspond to respectively.
(You could argue CEOs are monsters but Kaiba kinda owned that role better than Reiji, "as president of kaibacorp I have to do that everyday")
Aesthetically it seems like it's made for a villain.
Just look at Nighthowl or Ragnarok.
@Yliaster i always wondered the same thing. it really felt like they were wanting to do something more complex with him, especially juxtaposed with how he starts out manipulating shingo and wiping the memories of the lds trio without their consent!
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