2015 saw quite a few robotic and cyborg seedrians. Celes, Mikan, and Seraph are not robots.

Pictured:
Angel(magical girl themed angel robot seedrian)
Celes(space pirate seedrian who is now Destructus's number two)
Seraph(seedrian with armored suit that allows her to fly)
Cerulean(cyborg superhero seedrian)
Mikan(bounty hunter seedrian)
Sigma(robotic thorndrigan with four legs)
Terra(half-roboticized seedrian with purple armor)

Characters - Me