A-10 (no not a reference lol): A: like a bunch of other fanmade deks, she likes space (since she's 2 lots of 5, the one who has a star). she sometimes appears with two blue gloves that come from her double five. her eyes have two stars like ten does. also a bunch of other deks like bowling (because 10 pins) so i guess she likes bowling. she's a very cheery and excited block who's quite amiable B: el is a football. his arrangement is meant to look like a ball. like eleven, he is an avid player and enjoyer of the sport (because that amount of players is on a team). his appearance would reference two's appearance in The Two Tree (when 2 turned into... i guess an american (THAT'S MEEE-) football???). he acts a bit like eleven and has a strange, high-pitched voice 10: she acts like 10 and has one rectangular eye and an array display like twelve does. she introduces super rectangles. instead of the rocket thing, she has a clock on her back (because 12 hours on a clock). she's the parental figure that ten was. she also kinda takes twenty-one's role as she helps some earlier compounds figure themselves out (such as 11-1B). the reason she's light red and has one eye is because the naming scheme i use (dek, el, do, do-one) treats do similar to hundreds, as if it's a "big unit." so, she is one "big unit," hence her red-ness instead of being white.
since they're typically called do-one, do-two, etc. and such a naming convention is very compound-ish, 11-1B start out as compounds and have to figure themselves out. 11: he's mostly like thirteen. he doesn't split when his name is said, but he DOES split sometimes when he gets hurt or falls or something like that. he doesn't always split into do and one; he splits into a variety of things. he figured himself out because bad things happened around him when he was compound, i guess. 12: basically fourteen: cool skater dude, but he's more daredevilish than fourteen. but we get to see the compound form's thought process. since he's double 7, he's quite lucky! thus, his compound days involved testing that luck, eventually resorting to dangerous stunts that he comes out of thanks to his lucky double. he's radical! 13: she's like fifteen but less secretive. step squads would still have their whole agency thing going on, but there's less of an emphasis on the whole "hiding away" thing, though it could come up depending on the scenario. she figured herself out when trying to find some unique bonds within her. 14: she's like sixteen but without the party stuff. note that sixteen came to be when 6 played a PARTY GAME with ten, hence why sixteen was all about square parties. 14 here is less focused on that, but she retains most of sixteen's personality. she's four fours, and even has a four in the middle! 15: here's a completely original character since seventeen's whole painting shtick loses some use without the rainbow 7. do-five is a writer. she writes a lot, and is quite passionate about it. she especially likes haikus, as they have her number of syllables. she's twins (cough cough twin primes) with 17, who i'll explain later on. her arrangement is meant to resemble a haiku. 16: he's basically eighteen BUT with less emphasis on speed (since eighteen came to be when ten and eight were going fast). he's an absolute show-off with his rectangles and generally keeps the humor eighteen had, but with less of the impatience. 17: some may swap seventeen and nineteen's personalities, but i merged them into this fella. 17 is an artist. he came to be this way when thinking of what to do with his 7, as he, like nineteen, notices that he comes one block short of a lot of rectangles. his figured-out form has the "proud to be a one-off" thing going on, as 17 tells his fellow blocks to embrace their imperfections! he loves making silly, abstract shapes, which are the basis for some of his art. as stated earlier, he's a sort of "twin" with 15, as they both make some sort of art (15 writes, 17 draws). they're quite a creative duo, right? 18: he's a wise, mystical rectangle. he meditates a lot, and he also sounds like an old guy. he's very calm and gentle. he gets along with others, sometimes letting out a chuckle at 16's funny antics. he would likely have four stars dotted about his design. he may once be seen wearing gloves and shoes. 19: not a number explorer. she's a passionate entertainer with a rainbow wig (i got this idea from something cadex said once). she demonstrates a lot of her incredible abilities in her performances! she is another step squad, but she can also split into the divisors of 1 to 5, showing off an "equal division show" of sorts. her rainbow threes (with rainbow juggling balls like how they had them in Twenty-One and On) are another one of her delightful tricks. 1A: she's basically decimal 22 but genderswapped. two lots of B who play ball against each other. she's quite sporty. she can once be seen running across a rainbow circular field (as a subtle nod to 22/7 being an approximation of pi). 1B: he's the club guy as he's the last number in the first range of compound numbers. he's basically decimal 29 but with the voice/personality of decimal 23. 20: he's just decimal 20 but with more blocks. he's got the "double do dance" which he can dance "all day long" (cuz that many hours are in a day) but he doesn't have much apart from being a twenty clone.