The Frankenstein Experiment! But it's Robotics?!

Whenever the spouses are away there is a special ritual that these four siblings partake in(and later along with their kids). But often times the only boy of these four is the biggest victim or maybe not?who can really say for sure. Deep underground in some strange laboratory one of the many insane or even weird games has begun.
Pulling out her checklist the young adult in a strange get up began to recite, "Evil lair straight out of a horror movie" she looked around
"CHECK!"
"A sidekick along for the ride..." trailing off she turns around to look at her brother who she firmly tied to a chair due to his unwillingness to cooperate
"Hmm" she tilted her head, "hmmmmmm" watching her with unease her brother proceeded to struggle frantically.
"oh well I guess it counts" she shrugged
"CHE-
"I AM NOT YOUR SIDEKICK SERENITY" he burst interrupting her in a puff
"Oh but Haruka dear that it is not how this thing works" she smiled
"N-No n-no No no...no no NO" he shook his head frantically, "NOT YOU TOO!!" He pleaded clearly upset by this whole thing
"IT I-It was Kiera she infected you with the March Madness Syndrome" he cried, "NO!! WHAT HAS SHE DONE?! What has my TWIN DONE?! KIERA!! SERENITY DID NOT DESERVE THIS!"
Yes when the husbands/wives are away things get a little weird. Well no one can really say by how much I mean this is a family of geniuses and they find some ingeniously stupid ideas for being such smart long living Demi-humans but well the exact number of ideas is confidential....or maybe not