I heacanon them being this snuggly and physically affectionate, especially during their downtime. Maybe Tenya felt awkward at first but eventually submitted to Izuku and Ochaco's combined efforts and became their teddy bear/main source of body heat when it's cold. At least until Shoto came in and joined the cuddle pile.
(I imagine that even after the sports festival and the whole hosu debacle, he wasn't too sure yet about joining in and would just hang in the background while the twin terrors proceed to glomp Tenya after how distant he was during his revenge arc.)
Their group may have expanded but I like to think Zuku has a very soft spot for his first best friends (after Katsuki) and he cherishes the times spent together even when it's just the 3 of them.
I saw a thing on tumblr a while ago (by that I mean over a year ago) which had Izuku as a hobbit and since I love height differences and adorableness I ended up creating an entire fantasy au in my head based on that one credits animation from season... 3? I can't remember which season actually.. Eh. Whatever. You guys know which one I mean. (if you're like me anyway and found the costume design/✨aesthetic✨ of Prince todoroki unforgettable- *coughs loudly- moving on)
Anyway. Izuku is a hobbit/halfling whichever sounds cooler, who is training to become a apothecary. He is travelling to the Capital city, to learn from Lady Chiyo the court healer and stumbled across Iida on the way, who is also travelling to the Capital to train at the knight academy of UA.
Probably gonna be doodling more snippets of this, I just love drawing short characters~