this is the ki and tael anon from before. there are more receipts of tael being kihyun's son (and minhyuk's nephew/son as well, depending on how you see it). the very first time i listen to tael's voice in bp i immediately thought that i NEED this man to collab with the vocal god allfather. both of them have voices suitable for rock/rock ballad songs. this idea becomes more solid when tael covered this song briefly in weekly idol:

https://youtu.be/PNVGRIBByhM?si=Enr5IuluQy4O8NN6

this song, kihyun also did a cover to: https://youtu.be/lc3R0jVx0sA?si=9ukMFFubHhod_laM

that was the icing on the top. it confirms tael's status as kihyun's firstborn. imagine having them collab: tael in low register and kihyun in a higher one. the harmonization it would bring. a threat to the vocal community. what's more: both of them are super self-critical about their vocal performance and they thrive for perfection while singing. you have never heard tael sing badly, just like how monsta x members claim to never heard kihyun going off tune on their stages EVER.

there are some other points outside their boom boom vocal powers, too. first of all, like you said, being one of the shortest members of the group and then having a silly tom and jerry relationship with the other shortest member in the group. also both being very fond of the other short king (kihyun always doting on changkyun and tael basically inlove with maet). second of all, both are known to be sensitive (as in getting angry or upset easily). though in this case tael doesnt have a temper as much as kihyun does. theyre also known to be super sassy, they give merciless (affectionate) insults. AND the side eyes... though in mercilessness tael is closer to minhyuk, knowing both of them are extreme T in their MBTI.

third, theyre both neat and organized. my reference will be tael's tidy bed in bp which explains his character, and ki being the neatest member in mx is written in kprofiles. fourth, both love battleground. though in this case too tael will claim his spot as minhyuk's nephew, knowing how many hours minhyuk put on battleground.

i really want monbebes to notice tael. therefore when kihyun got discharged they will talk to him about tael, and kihyun will invite him to his show! wishful thinking... but anyways...

beside tael, i have been claiming both jiwoong as hyungwon's long lost brother. reason being them being funny naturally and sometimes can be very out of the pocket. have a great comedic timing too. have godly visuals too. but theyre a whole other discussion.