Easlick
The roommate who lives in their room like it's their own personal cave. If you try to get them out, they'll yell at you like you're the devil.
You: 'Hey, wanna eat?' Easlick: 'No. I'm in my room. I'm not coming out.'
You: 'Let's play video games!' Easlick: 'I'm not playing. I'm in my room. I'm not coming out.'
You: 'We're going to the store!' Easlick: 'I'm not going. I'm in my room. I'm not coming out.'