1. When the twins showed up at the Midsummer Night's club, the twins were really a pair at the bar. They definitely made certain Sinners heads turn. Also there has been a general consensus after the the Dreamwalker Incident, that the twins should dress up again like that.
2. The twins have different tastes in music. Thalassa likes heavy metal, Theo enjoys classical. Sometimes there's a fight over who controls the music in their shared office. So much so that Nightingale has stepped in and scolded them a few times, once she threatened to take away their speakers. ;_; so harsh!
3. OwO calls them "jie jie" (big sister) and "gege" (big brother) - it's very cute and some of the Sinners have noted that OwO gets away with so much shit as the youngest Sinner in the whole MBCC. Then again they don't mind, out of all of the people in the facility, OwO has the brightest future.
4. Thalassa has a sweet tooth and Theo likes sour things. Of course snacks that are sweet and snacks that are sour are not always healthy. They have a secret stash of snacks that they change the location of because Nightingale will tell them off for eating unhealthy again. Thalassa has like a container of white rabbit sweets, Theo has plums encased in malt. The Sinners who drop by usually help themselves to the Chiefs snacks.
5. Langley always teases the twins. She calls them her cute "rookies" - whenever she drops in to check on them, she will make sure that they're eating and sleeping well. She is a caring boss who looks after her subordinates but isn't afraid to punish them if they truly fucked up.
6. The twins get dragged into hotpot parties with Bai Yi and the Whitestone gang. Thalassa enjoys them but Theo does not. He has a hard time with spicy food and mala hotpot is enough to make the man cry.
7. When dealing with events in the Bureau, say Mess started a fight with EMP over cheating during a game or Ignis is practicing in the furnace room. The twins take turns, sometimes they flip a coin. Sometimes they would try to blackmail each other to do it. - typical sibling behaviour.
8. Despite their poor health and fitness, surprisingly enough they heal quickly and the medical team are stressed because the twins are tapdancing on death's door almost every time they have a massive sinner incident.
9. The twins woke up in the healing chamber, hands holding each other. They immediately knew instinctively they were siblings, and that the shackles were linked to both of them.
SPOILERS FOR CHAPTER 13
10. The MBCC was a fucking mess when Thalassa was *killed* in the Rustfire - Theo collapsed but his shackles kept most of the Sinners at bay, he was comatose until Thalassa woke up, then Nightingale knew that Thalassa was alive.
11. Whilst the twins were unconscious, the twins were fighting the effects of the Black Ring and Corpseborne. The Sinners and Thalassa were worried because Thalassa was a little more reserved. It took a while but she was back to her normal self.
12. Donald has taken a liking to both of the twins and the food at the MBCC cafeteria. He will drag them to eat lunch, and forces them to eat more cause he thinks they're too skinny and need to eat more.