- Mikasa had a super ticklish weak spot on her neck that Eren exploits on a daily basis.
- On at least one occasion, this put him in the hospital with a broken nose
- Eren and Mikasa are both equally scared of horror movies
- Mikasa has a phobia of thunder
- They have at least one set of twins (my personal headcanon are twin boys who are both Eren Jr. and Mikasa never fails to remind Eren how he deserves to raise himself two times over).
- Eren is totally the dad that pulls out the naked baby pictures when his teenaged kids bring dates over
- When he does something that annoys or pisses her off, Mikasa banishes Eren to sleep on the couch. This always ends with him crawling into their bed at a ridiculous hour whining and saying things like “But Mikasa, a night not spent beside you is a night not worth living at all” to which Mikasa says “Shut up and go to bed Eren it’s 3 AM.”
- Mikasa has “the look”. The one time she had to pick their kids up from the principal’s office was the last time it ever happened, period.