Aries=(If you liked them back) You would say "I like you too" but all your admirer/crush heard was a hideous roar. Gladly, they didn't run away but only smiled back politely. (If you never knew them) You rasped at them to back off because you being a tsundere, you were shocked and at the same time flustered and just wanted to escape the surprising scene. (If you knew them but you didn't like them back) Possess them :3
Taurus=(If you liked them back) "'Kay," was all you said but on the inside, you were filled with questions and was mentally picturing a lot of Math problems. (If you never knew them) You were surprised and flustered and pretended that never happened by changing the subject completely. (If you knew them but you didn't like them back) "...Very funny." You snapped at them rudely, literally and physically at the nose (in that order).
Gemini=[Byron] (If you liked them back) Your mouth will hung slightly open by surprise and your coolness decreased and will be replaced by stutters and blushing. (If you never knew them) "Hahaha! I know you do." You walked away and waited for your admirer to leave. When they did, you sighed loudly and wiped your nervous sweat off your forehead with your cape. "Welp. That was weird." (If you knew them but you didn't like them back) "Uh... Thanks?" [Ned] (If you liked them back) You blushed and smiled softly. "I like you too." (If you never knew them) You chuckled, saying "Well, we have to know each other first." (If you knew them but you didn't like them back) You declined and apologised to them politely but you still offered them to be your Friend.
Cancer=[Inspector Cranium] (If you liked them back) "...I know." You then sprinted out of the room you two were in and went to your lab. "FINNEY!!! IS THIS A JOKE?!! MY CRUSH JUST ASKED ME OUT KDKEBWIDJWH!!!!!" (If you never knew them) You laughed before giving them a serious face. "Tell me the truth. How and why did you sneak in my lab? Are you working with two kids named Jackson and Jillian Gerard-?!" (If you knew them but you didn't like them back) "O-kaaaaay..? But ANYWAYS! Wanna be a test subject for my scientific mind project. I'm sure you'll survive-!!!"
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To be continued!