* MarthDebutedInSmashBros: ''Both'' of the [[GuestFighter Guest Fighters]], as there had not been a ''MeltyBlood'' or ''AkatsukiBlitzkampf'' game released overseas at the time ''Exe:Late'' was released in the West.[[note]]Although the most recent ''Melty Blood'' game did get a Western release after the fact.[[/note]]
* TheOtherDarrin: Rather than Creator/RioNatsuki voicing for Eltnum just like her ''VideoGame/MeltyBlood'' counterpart, Creator/SatomiAkesaka takes over instead.
* RelationshipVoiceActor: Creator/YuukiKaji, Creator/YoshitsuguMatsuoka and Creator/SaoriHayami would go on to [[RoleReprisal reprise]] their respective anime characters in the later French Bread-developed fighting game with the same type of HD engine, ''VideoGame/DengekiBunkoFightingClimax''.
* WhatCouldHaveBeen: Eltnum "Sion" is apparently a built as a test case character for ''VideoGame/MeltyBlood HD'', a game whose development has never come to pass.
** The devs have expressed interest in bringing in a ''VideoGame/{{Skullgirls}}'' character for a hypothetical future build of the game.
*** Specifically, a hypothetical sprite design for Filia has already been done as part of their congratulatory message to Lab Zero after the latter got their game released both in PC and in arcades.