"Inoel? She is a very cute girl." - Mirajane
"Although I don't like to laugh or talk, I'm surprisingly easy to talk to." - Gray
"Hey, she's just a silly girl" - Laxus
"That kid is working very hard to live." - Makarov
Therefore, Enol is actually not as unapproachable as she appears, she is just not very good at expressing herself.