Update on sisters POS bf

I posted about a month ago about my sister & her boyfriend... she finally broke up with him & told me the truth about him... my sister is NOT the type to mess with her hair, wear false anything, wear a lot makeup etc... a couple weeks ago, she bleached her hair from black to platinum out of NOWHERE. Completely out of character... a week later, it went from platinum to red. Then she started caking on makeup, wearing false nails & stopped coming around... super not like her. Come to find out, this psycho man made her bleach her hair to "match him" since he is blonde... he did the bleach job & damaged her hair. & if that isn't bad enough, he then made her color it red & wear fake nails, tons of makeup etc. because he wanted her to look like his ex girlfriend. My sister is Mexican, & this ex of his was white. He was trying to take away her Mexican characteristics as well... He decided he wanted to be the "18 year old version of himself" & therefore his current girlfriend had to match that.. like he legitimately told her he was going to act & dress the way he did back then... he is 29 years old currently... he also wouldn't let her talk to me because he wanted me to apologize for calling him a pig (which he absolutely deserved). She suffers from depression & anytime she would confide in him & start to cry, he would kick her out of his house because it made him "uncomfortable". Basically this guy is a straight up psycho & brainwashed my sister into thinking this kind of treatment is normal. He took advantage of it being her first relationship ever & tried to tell her that's just how boyfriends and girlfriends are... they work together & I'm genuinely afraid for her because his behavior is insane... She's happier now & back to herself other than the side effects of how he treated her but doesn't see why I'm so concerned about her safety... hopefully I'm just being paranoid ☹️