noun which may take the genitive case particle 'no', noun
spiritual person; into spirituality
Abbreviation of スピリチュアル系. Refers to a person interested in spirituality, often with a slightly casual or trendy nuance. Can also be used as a no-adjective.
彼女はスピ系で、よくパワーストーンを集めている。
She's into spirituality and often collects power stones.
スピ系のイベントに行ってみたい。
I want to go to a spiritual-type event.