Dragonfly

Closest match: Argentina silus genome assembly, chromosome: 11 Common name: Greater Argentine

oh buddy

pedants will get up my ass if I don't mention that Harold technically originated in an issue of the Question, but for our purposes what matters is his second-ever appearance in Batman #448, the first part of an arc called the Penguin Affair that spanned two issues of Batman and one of Detective Comics.

tl;dr Harold has had a bad time for his entire life because he's ugly, but he also happens to be an absolutely brilliant engineer. the Penguin scoops Harold up off the side of the road after he gets the everloving shit kicked out of him for looking the way he does, and takes Harold in.

unfortunately for Harold the Penguin is the Penguin and proceeds to treat him pretty badly while enacting his latest scheme (something something kidnapping his favorite soap opera actress while trying to auction off trained attack birds to various shady governments, typical Penguin shit). Harold, being an upstanding sort of guy, realizes that he's being used and ultimately sides with Batman, disappearing at the end of the adventure

you'd understandably assume that that's the last we'll see of Harold, but he makes an unexpected return in Batman #458. Harold has been hiding out in an abandoned building in a shitty part of Gotham (an admittedly silly phrase, as it implies there's a part of Gotham that isn't shitty) fixing toys for impoverished children. unfortunately the local parents assume some creep shit is going on and promptly form a mob about it

you'd expect this to end with everyone learning a valuable lesson about discriminating against people who look different and Bruce Wayne setting Harold up with a cushy job in Wayne Enterprises R&D or something, but instead he just. takes him home and sets him up in the Batcave.

after that Harold becomes an intermittent fixture in the Bat household; every time you start to think the writers have surely forgotten about him he pops up again to remind you he's still there.

on Bruce and Tim's first night out as Batman and Robin in Batman #465 watching soap operas with Alfred and Ace

and in Batman #470 he gets a casual namedrop to remind us that yes, he's still down there building things

bear in mind that all thee issues cited so far are from 1990 and 1991, but Harold is around until he dies during Hush in 2003.

this man was fully living in Bruce's basement, apparently aware of his identity, for over a decade and predates a quite a lot of other important Batfamily events: Barbara becoming Oracle, Jason's resurrection, Steph and Cass existing at all - hell, he even predates this version of Ace by a few issues.

I forget his name sometimes, but I will never forget him!

I was first introduced to Harold in the 1999 Cataclysm/No Man's Land storyline when Alfred comes upon him driving a forklift through the COLLAPSED BATCAVE! No context or anything, just a funky little guy cruising around in his tonka truck getting some work done..

any time someone is in any kind of crisis or upheaval, offer to feed them. tell them they don't have to choose what it is if they can't make decisions, just ask about allergies and preferences and tell them you're just gonna make food happen at their house.

friend having a baby? delivery gift certificate to order food to the hospital after the kid shows up.

someone's relative passes away? offer to make them dinner.

buddy gets laid off? ask if you can order them lunch.

pal stuck in a depressive episode? offer to drive them to fucking mcdonalds, if that's what they want.

people in crisis are tired and sad and angry and the last thing most of them are doing is thinking about feeding themselves. so if you have the ability or time or money, providing that is always, always a good move.