Does anyone relate??

Is it normal to suddenly change your whole personality based on a current fav character?? I had a demon slayer phase and my fav character was Gyomei...I went feral whith everything that slightly reminded me of him or just the show :O and recently I had another tf2 phase and my fav characters are medic spy and scout so my personality changed again and I started wearing dog tags or red clothes, also started learning french (spys language) on duolingo lmao (I have german (medics language) at school but i still cant speak properly) im pretty sure ppl have this kind of presonality shift but i just wanted to know if this kind of shi is called something lol