[@Eklispe] brought up a good point with the themes, so I changed them both slightly. Also swapped the first part of the name on [@Xeiyenreisha]'s request.

[b]Name:[/b] Eve, The Princess of Dusk
[b]Level:[/b] 7
[b]Attribute: [/b]DARK
[b]Monster Type(s):[/b] Warrior
[b]Effect:[/b] This monster can not be Normal Summoned or Set. This monster can only be Special Summoned by banishing two DARK monsters from your graveyard. Increase this monsters ATK equal to the amount of your banished DARK monsters x200. Once per turn, you can Banish one DARK Fusion monster from your Extra Deck to target and Banish one monster your opponent controls. This card can not declare a direct attack the turn you use this effect. Return the banished monster to its previous position during the End Phase.
[b]ATK/DEF: [/b]2100/2000

[b]Name:[/b] Eos, The Princess of the Dawn
[b]Level:[/b] 7
[b]Attribute:[/b] LIGHT
[b]Monster Type(s):[/b] Warrior
[b]Effect:[/b] This monster can not be Normal Summoned/Set. This monster can only be Special Summoned by banishing two LIGHT monsters from your graveyard. Increase this monster's ATK equal to the amount of your banished LIGHT monsters x200. During either player's turn, when your opponent Special Summons a monster you can Banish one LIGHT monster from your hand to negate the summon of that monster, and if you do, Banish it.
[b]ATK/DEF:[/b] 2100/2000