About a man who’s unusually eccentric only on LINE.

A man I met a little while ago keeps sending me strings of characters that don’t really mean anything even when I search them, and when I ask what they mean, he only replies with stickers. (Last night he sent me “光恒,” but does anyone know what it means?) He also has strange symbols in his LINE display name and constantly changes his profile picture, which makes him seem kind of like he has a bad case of middle-school syndrome. He’s normal when we meet, and looks more like a handsome older gentleman, but do you think continuing to see him will become a hassle?