na-adjective
Describes a person who is reserved, easily embarrassed, or hesitant in social situations. Often used with な to modify nouns.
彼はとてもシャイで、人前で話すのが苦手だ。
He is very shy and not good at speaking in front of people.
シャイな性格だから、初対面の人と
Because of my shy personality, I find it hard to open up to people I've just met.