Deidara:
(does not work against a wall) j -> j -> j -> sj -> aerial j -> repeat
Gin:
j -> j -> j -> j -> aerial j -> repeat / aerial j -> repeat
(against a wall) j -> j -> j -> j -> wait -> repeat (timing to do the infinite is tricky at first but is easy once you figured out the timing)
Ichigo:
(During First transformation) j -> j -> wj -> aerial j -> repeat (the timing on aerial j to link into a combo has tricky timing)
The Second Ichigo:
j -> j -> j -> sj -> su -> sl -> aerial j -> repeat
Ikakku:
j -> j -> sj -> sj -> aerial j -> sl -> repeat (the hardest combo to perform)
Itachi:
j -> j -> j -> su -> repeat
Jiraiya:
aerial j -> repeat
Kakashi:
j -> j -> aerial j -> repeat
Karin:
j -> j (-> j, this attack is optional) -> wj -> aerial j -> repeat
Neji:
j -> j -> j -> wait -> repeat (timing is tricky but becomes easier once you understand the timing)
j -> j -> sj -> j -> wait -> repeat (timing is as strict as his other infinite but it still takes a while to learn the timing)
Orochimaru:
j -> j -> j -> sj -> j -> j -> su -> aerial j (cancel the first hit with sl) -> sl -> repeat
Rock Lee:
j -> j -> j -> l -> repeat
aerial j -> repeat
j -> j -> j -> u -> aerial j -> repeat
(During his transformation) j -> j -> u -> sj -> wj -> sl ->aerial j -> repeat
Sakura:
(Against a wall) j -> j -> j -> su -> u -> sj (do sl before the rock is thrown) -> sl -> repeat
Sasuke:
(during transformation and against a wall) j -> j -> j -> aerial j
(during transformation and does not work against a wall) j -> j -> j -> (wait) wu -> sj -> repeat