after just two weeks khoa starts realizing that:

tim is bonkers

like, off the wall bonkers

and brilliant

bad combo, khoa knows from experience

tim desperately cares about bruce and dick and alfred

but does not see himself as part of the family (hence the fake uncle thing)

khoa also realizes that tim keeps secretly patching himself up at home (because he’s downplaying any injuries after patrols) and eventually khoa is like. “okay. i don’t care what happened*, but you do have to stitch that up properly. my fake self can’t be in trouble for child endangerment.” and he patches up a surprised and wary tim. this becomes a routine.

*(khoa knows what happened, he was stalking batman on patrol that night. like most nights.)

ANYWAY. basically what i’m saying is: identity shenanigans where bruce’s ex is lurking around gotham pretending to be tim’s uncle and tim doesn’t know about the ex thing and bruce doesn’t know about the uncle being fake thing and everyone is keeping secrets from each other. and khoa goes from “this is a convenient way to spy on bruce” to “if anything happens to this unhinged baby robin i will kill everyone in this room and then myself” and ends up co-parenting tim without bruce realizing.

also in between having concerning realizations about tim’s self-preservation skills and spying on bruce, khoa finds time to have fun with it. like imagine a parent-teacher conference at tim’s school. the school calls bruce to schedule because his contact info is still on file from when tim was staying with him. but obviously khoa catches wind of this and decides to also turn up, in full uncle disguise, and spends the whole time fucking with bruce and having a blast.

like bruce was kind of checked out last year when the conferences happened and now he’s starting to claw out of his grief enough to be present and engaged. especially now that tim is staying with his “uncle” bruce is like wait. wait. and is trying to make more of an effort, so he shows up to the conference. and then at the conference khoa is just lounging in his chair like, “tim fell asleep in class? good for him, i’ve been telling him to get more sleep” and bruce is trying to be Even Better Dad to compensate while his eye is just constantly twitching.

[parent-teacher conference shenanigans with contributions from @kerosceene, @90kon, & @mammutblog:]

teacher: i won't sugar coat it, tim is very nearly failing literature

khoa: ah. a ridiculous subject anyway.

teacher: i notice tim is very... isolated. he doesn't seem to engage much with his peers, even when they try to initiate conversations with him

khoa: well children are idiots, i don't blame him

teacher: tim got in a fight—

khoa: did he win?

khoa: oh tim’s getting an A in science? we should celebrate. i’ll take him to get ice cream for dinner. we usually do that anyway but this time he can have extra sprinkles

bruce: that’s not— [deep breath] in my experience tim has trouble remembering to eat a balanced diet when left to his own devices, which is important to his growth at this age.

khoa: yeah of course. that’s why sometimes we get frozen yogurt instead

bruce: tim is lactose intolerant

khoa: [pulls out a packet of lactaid] i know

anyway!! after a bunch of shenanigans and awkward actually-taking-care-of-tim moments, something big happens where bruce and tim are in deep trouble and khoa breaks cover to burst in and rescue both batman & robin and all secrets come out. tim is shocked that he didn’t figure out who khoa was (in tim’s defense, he’s had a Lot going on) and bruce is soooo mad he didn’t see through the disguise, but also bruce is. grateful. that khoa has been there for tim, especially when khoa finally gets to do a full “get your head out of your ass” rant about the various ways tim has been pretending to be way more okay than he is.

khoa: if you’re going to CARE about people so much the least you can do is! pay attention to them!! this kid is your problem, act like it!

bruce: sounds like he might be Our problem now

khoa: only because i don’t trust you to get the job done 😤

(ALSO because khoa is literally there to lurk and observe he notices the league slipping into gotham and they end up rescuing a resurrected jason early.)

anyway i just think the concept of khoa being tim’s deus ex machina adult is so fun. like tim is on some international mission with young justice and it seems like all hope is lost and then freaking ghost-maker swans in and takes out all the enemies and gives tim a whole rant about How Is Bruce Letting You Run Around Like This, Does He Know What You’re Getting Up To In Your Spare Time, Where Even Is He. the vibe is ghost-maker dropping a (carefully patched up) robin on wayne manor doorstep with a sticky note on tim’s forehead reading TAKE BETTER CARE OF YOUR THINGS.

(bonus au of this au from aubrey where bruce DOES see through khoa’s disguise:

Tim: Bruce, this is my uncle--

Bruce: ANTON?!

Khoa: 😘

Tim: oh my god DID YOU FUCK MY FAKE UNCLE, BRUCE?)