Taokaka's favorite things in life seem to be, in no particular order: family, food, sleep and big breasts. She enjoys fondling and burying her head in Litchi's "airbags," tells Noel she should eat more meat buns to "make her boobies bigger," and spends much of Continuum Shift eating, sleeping and groping every other female character she comes across, even asking Bang if he's visiting Litchi's clinic to fondle her breasts like she is.
Taokaka: "Oh Boobie Ladyyyy, where aaaare yooou? I wanna play with your bouncy boobies!"
She's not limited to groping Litchi's breasts, either. In Continuum Shift Tsubaki becomes a victim of Tao's ravenous lust for boobies. Noel would be as well, if she weren't flat-chested, something Taokaka has to make a point of mentioning every time she sees her. To round out this list, Chronophantasma sees Tao looking for "Lacking Lady" on Ragna's behalf only to end up groping Makoto in the latter's Arcade mode.
In a non-canon segment, Litchi was apparently very... "thorough" when examining Noel's "beautiful, lithe" body in a Teach Me, Ms. Litchi: Reloaded segment... and doesn't realize she was being so "thorough" because it was like "a dream come true".
Also, it's hard not to envision Litchi Faye Ling as an ambiguousbisexual given her propensity to dress other girls up in cute outfits and dote over them (Noel in Calamity Trigger, Tsubaki in Continuum Shift, Bullet in Chronophantasma). The fact that she is the most common target of Taokaka's breast groping, and seems almost tolerant (albeit embarassed) of it on a few occasions only adds to the speculation.
Noel has become quite a case of Even the Girls Want Her, as Litchi has a fetish for dressing Noel up in cute outfits, and Makoto is extremely protective of her. There's also a lot of Noel X Rachel art, and much of it is official!
Noel and Tsubaki, especially on Noel's side. Even with Tsubaki trying to kill her, Noel cares for her friend so much, that she has to love her, platonically, or romantically. She even became Mu-12 again, just to save Tsubaki, despite the traumatic memories associated with this transformation.
The trope was canon in the first drafts.
Jin is... a leetleobsessed with Ragna. "Ah~! Long time no see...BROTHER!!!~"
The creators aren't even trying to hide it. In Teach Me Ms. Litchi he has hearts over his head and in his eyes every time Ragna speaks.
Jin's obsession is played with a lot in the various gag reel endings in the story modes - even in those for mostly unrelated characters. From Relius Clover's BBCS Extend gag reel, where he mind-swaps several of the other characters, in particular Ragna and Jin:
Jin(?): NOOOOO! Hand-check, Jin! Hand-check this instant, you freaky—!
Ragna(?): Finally, I'm where I've always wanted to be... inside Brother's body...! *Sniff* *Sniff* It 's like a dream come true...!
Jin(?): This isn't real...! Nope! I'm dreaming, and I'm gonna wake up, yeah?! Somebody pinch me—dammit, Jin, not YOU!
In Jin's joke ending of CS, he's trapped on an island with 3 fake Ragna clones. The first thing he does is tell Noel to leave, and that he's going to have fun....
In Chronophantasma, he ends up back on the island. He insists that his feelings for Ragna are entirely murderous in nature, but the Ragna clone doesn't buy it. The clone even admits to being slightly curious towards Jin as well. Then again, he was created from Jin's imagination.
In episode 2 of Teach Me Ms. Litchi Again of CP, Jin constantly pesters Ragna for a "body examination". He also agrees to teach Tao in exchange for a method in catching Ragna. The last we see of the two is Jin dragging tied up Ragna off to do god knows what with him.
In addition to the Manly Gay accusations Azrael faced on BlueRadio, during Bang's Chronophantsam gag reel, Azrael confronts Jin on the size of his inner man during the first round, where Jin is nearly dying from the heat. The mind doesn't need to wander far to connect the dots.