My brother is acting strange…

Howdy, my Name’s Kevin and I have a twin brother, Evan, and my brother has some enemy he calls Seven (I dont know if he’s actually called Seven but I know he’s not 7 years old so I do t know where it’s come from) and Evan went to the park a few days ago but since he got home he’s been acting weird, like a lot like Seven, and Seven is very similar to Evan like same hair, same favourite Color, some of the same facial features and or expressions and I know it’s probably just normal coincidences but I also can’t shake this feeling something ain’t right, also Evan has been taking a lot more showers which is weird because he never used to shower, ‘cause he spent all day gaming, but the sudden change is quite confusing and Evan’s voice is like weirder his voice is sounding different like it’s a bad impression of him, but i also found a fedora and leather jacket in “Evan’s” closet when looking for my shoes but the fedora and jacket are suspiciously similar to Sevens so it might just be me being confused or missing something obvious but it doesn’t feel right