Erin's only a mad pharmacological doctor. She could never hope to reach the levels of Spark-level insanity that Akashi seems to on a regular basis.
Well, I was talking about in terms of the template, and Akashi's role in comedic fanworks can mostly be fit inside the templates "Akashi's been fooling around again" and "Akashi's shady new invention".
As for actual sparkiness/mad science, well, it depends on how Eirin's flanderized in fanworks. Some of them have her being a prodigy in all things biotechnology in addition to her pharmaceutical expertise. Like the Eirin in Silence of the Rabbits, who basically has a similar specialization as Tweedle Blitzengaard (biological constructs and poisons/biochemistry), in terms of sparkiness.
Updated
FIN.Mhm!*They are developing equipment.Mmhwaargh! Wh... Why are you making those weird noises!?squelchI'm the one who's going to have you make it! Be a good girl and take it quietly!SHAKEMmgrh! I... I could say the same for you! You've been trembling all over since a while ago....!*They are developing equipment.At least your body is honest, eh...!schlickMgh!I'll have you make miiine! Mmmaarggh!?SHIVERDoes it really feel that good when I put those mats inside for you!?