Hes A Dweeby Little Guyyyy - Tumblr Posts

Whenever tenma gets super stressed or upset about something he really needs to do something with his hands. He had a bad habit of pulling on seams and loose threads from his costumes so Yuki went looking for something to get his hands off his clothes and landed on woven lanyards! Yuki only taught him the 90 degree box stitch and Tenma ended up going online to learn a ton of other patterns too! So, pretty much every time they have shows coming up or Ten-ten has filming to do he ends up making fistfulls of lanyards and other little handicrafts! Yes, he made friendship bracelets for the entire summer troupe. Yes, he was very, very proud of how nicely they came out. Yes they made it into an entire ceremony when Kumon joined, and yes, Tenma officially dubbed him, ‘part of the squad’. He kept them in a shoebox in his room until he somehow filled it up. Lanyards were kinda ending up all over the floor and Yuki was filling up the natsugumi Swear Jar real quick from stepping on hard plastic so Tenma ceremoniously took his box into the common room, lined everyone up, and distributed lanyards to the entire company. 

So that's why Tetsuro has a baby pink lanyard for his house keys.