It's the only one. Out of spells you can cast yourself, at least.
Edit:Hmm, JP wiki suggests running Kokoro as an HP tank subbed Healer. This allows you to use her "healing skills buff from emotion" (and is probably a dev intended build considering this is nearly the only way to use that...), and you get not 10, but 14% HP regen for only 85% delay when concentrating- and 4% healing on the party which, whilst low, is a nice on-the-side with that kind of delay. It cycles emotions heavily but tbh a tank kokoro doesn't care too much, the up/down isn't -that- large on others and if she's not attacking she doesn't need to stick to one all that much. She can still benefit from getting up Fighting Spirit for 30% damage reduction so she can actually compete as an HP tank, for support she's still got "debuff with emotion" along with healer skills, and the emotion buffs are for... well, RegalStar said it's 16% (or 20% speed) which kind of makes this build depressing, sigh.
Sadly, she doesn't bring a whole lot to the table other than good survivability in such a build- and it requires awakening her anyway to -get- that- hp regen. If the emotion healing buffs were worth a damn, maybe it'd have been nice; or if the emotion stat increases were better than like 8~10%. As an attacker, she doesn't really compete with the juggernauts or anything, but she's at least got enough good stuff to be certainly good enough to use if you like her? :T Kind of a let down for a character with cool gimmick stuff. Oh well. Like, at least Koishi can get strong if you exploit earth spirits synergy, and Shou similarly via her own synergies and rage counter? Kokoro doesn't really seem to have a "thing".
Then again, if she works better in practice than Komachi (more turns for regen, and fighting spirit, instead of higher max hp), well, all the fans of Komachi tank have a second option, so I guess that's something; Komachi tank brings little to the table other than surviving either, not that I've used that build. Avici is pretty alright and tank-Komachi can still DTH in randoms, so it's definitely not like she doesn't do anything, but.
Well, fourth option, because Awakened Minoriko is a thing (although I'm not sure she could main tank other than mag bosses, but she's got great support and beastly hp/mp flow instead) and Mokou has regen+fighting spirit and Resurrection for hp tanking. Since she didn't even have a damage reduction from Fighting Spirit back when I used her, she'd sure do a lot better now >_>
edit:Wow, I only just realized Mokou's regen is 20% instead of 10% like everyone else (barring awakening minoriko) gets. Now that fighting spirit works, hmm. Actually, if you run Keine tank for her new passive and awesome awakening swap power, Mokou+Keine frontline sounds really nice for the def/mnd bonus. (Or for running a hybrid keine with offense, since she can get high MAG now, but it's definitely a gimmick build. New powerful subclasses could make it an effective gimmick build, though)
edit again:I just realized Mokou gets Sheer Force in awakening. Sheer Force... on an actual great tank character. Pierce power on Iwakasa Curse debuffs! This is starting to sound nice. Maybe sub toxicologist if you don't want to use her great mp regen on pharmacologist or healer. That's actually a pretty nice sounding idea as toxicologist skills are accurate, combined with Sheer Force... ooh, and any remotely shk-vulnerable boss would really go down to Guardian's Shield Bash, which has a very high SHK rate, actually really good once you have someone who's better than Kogasa or Utsuho for casting it with as support. Mokou's starting to sound like resurrection isn't the only gimmick she's got.
Taking advantage of bosses that aren't too heavily resistant to SHK and PAR... *Drools* Or, you know, just a real high accuracy psn/heavy effect...