Suppressed presence with ~た+つもり


Grammar Explanation

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While changing into her uniform, Rize hid in the closet when she sensed someone unfamiliar nearby. She tried to completely hid her presence, but Cocoa found her.

ココア:
完全(かんぜん)気配(けはい)(ころ)してつもりなのに」
“I thought I completely suppressed my presence, and yet…”