I just realized that Spade and Ai/Dark eye are very compatible with
Riliane and Allen/Alexiel from Story of Evil...

(Spade and Riliane)

•Both are chill 24/7.

•Both are very prideful.

•Both are obsessed with tea time.

• Both care about their looks the most.

•Both have a special relationship with their assistants.

-Both are spade cards.

Spade- King of Spades

Riliane- Queen of Spades

•Both have something to do with roses.

Spade-Gives them to girls like the gentleman he is.

Riliane- wears rose based accessories.

(Ai/Dark eye and Allen/Alexiel)

•Both are personal assistants of their bosses.

•Both deeply cares for their bosses.

•Both hide their real identities...Then their bosses knows.

Spade-Known it was Ai all along.

Riliane- Alexiel confessed to her before saying goodbye to take her place in the execution.

•Both are also chill 24/7.

•Both crossdressed.

Ai- To make everyone think she's a boy to lead everyone astray.

Allen-To trick everyone into thinking he's Riliane so that she can escape while he sacrifices himself.

•Both help their bosses with medical service too. 

Ai-Has to take care of Spade because of his fever.

Allen- aided Riliane's arm because it was injured.

•Both wear ascots

•Known their bosses since childhood.

Ai-Met King when he and Jack came to steal the fairy jewel that she wore.

Allen- Litterally Riliane's older twin brother Alexiel.

• Are the ones serving tea to their bosses.

•Barely expresses excited emotions. But sometimes do.

That's all I could remember. But yeah, it was so similar.