Copy pasta from the Fellowship thread.
Ryu, Ken, Blanka, Honda, Gief, Seth, Sagat, Hakan, Ibuki
Ryu, Ken, and Sagat are fireball control. All three characters corner juggle properly, so that’s cool. Blanka and Honda lose tools when she has Housenka (Blanka Ball and Headbutt), so that’s good in controlling those matchups. Gief simply because he juggles, and to take away full screen lariats for building meter. Seth loses both Sonic Boom and C.FP against Housenka. Hakan because he corner juggles and to nail him if he tries to oil up from full screen. Ibuki corner juggles, and she won’t be able to throw any air kunai’s when Chun has Housenka at the ready.
Juri, Chun, Dudley, Rufus, Abel, Fuerte, Bison, Balrog, Cammy, Fei, Akuma, DJ, Hawk, Gen, Adon, Dan, Guy, Rose, Sakura
Characters who don’t Housenka corner juggle, and don’t otherwise give you an opportunity to ultra them. Cammy is sort of iffy - free Housenka on blocked Canon Spike, but Kikousho will probably be more useful here.
Vega, Viper, Gouken, Cody, Makoto
Vega corner juggles with Housenka, and also gives you a few opportunities to hit grounded Housenka, but Kikousho could be nice as well. Viper…Housenka mainly to take away Seismo spam. Gouken…fireball control, but he doesn’t corner juggle. Cody and Makoto, don’t know. Makoto corner juggles with Housenka, but I don’t think she will offer any other opporunities to hit ultra, nor will it discourage her from doing things. We’ll see.