Dabi had known you for a long time so he’d known you long enough to know about your headaches and nightmares. Being friends for so long makes it easy for when he wakes up and you’re not there. Usually means you had a nightmare and needed some fresh air or got a headache and needed Tylenol

this night was one of those nights. He woke up and you weren’t there so he got up and walked downstairs. He knew the toll your nightmares brought so it was no surprise when he found you throwing up in the sink. He walked over calmly and placed a hand on your back soothingly while he held back your hair

Dabi: “You’re ok. Just let it out”