Source
You can find Cocoa skills on the official Twitter.
Cocoa's skills

S1 - Professional Origami
■ Affects all allies.
Recovers 17.76% of cover's Hp as Hp.
■ Affects 2 ally unit(s) with debuff randomly.
Dispels 1 debuff(s).

English translators strike again with misinformation. We checked the JPN and KR skills and the healing part is basically what Liter does, so this:
Cover's HP recovers by x%.
This means that Cocoa will heal the covers of all allies with her S1 skill and not heal them directly as the English description tries to imply. Still, cover healing is a great and useful mechanic, which allows your team to survive for longer.
As for the second part of the skill, Cocoa is the first Cleanser in the game, so she will be very useful against debuff-heavy bosses (like Nihilister or Chatterbox) and in PVP.
S2 - Professional Tomato Sauce
■ Activates when attacking with Full Charge. Affects self.
Professional Tomato Souce: Sustained damage ▼ 4.37%, stacks up to 15 time(s) and lasts for 5 sec.
Cocoa's S2 gives her a really decent survivability boost which is better than a lot of tank characters, but sadly she doesn't have a Taunt skill to make use of it. So while this looks great on paper, it will be hard to utilize it.
Burst - Professional Tomato Sauce
■ Affects all allies.
Dispels 1 debuff(s).
■ Activates when Professional Tomato Souce is fully stacked. Affects all enemies.
ATK ▼ 13.59% for 10 sec.
Another debuff cleanse skills, this time party-wide, but honestly Cocoa fills more the role of a sub-Burst I character, so she will rarely use her Burst either way.
Also, the second part of the Burst is also underwhelming as not only the ATK debuff value is pretty low, but also you need to stack the Tomato Sauce buff to 15 stacks to actually apply it.
First impressions
Honestly, Cocoa looks like a niche character that - thanks to the Cleanse - will shine against some bosses (and maybe in PVP), but it will be hard to justify using her as your permanent sub-Burst I character - for the main Burst I spot her kit is sadly way too weak and too situational.
Should you pull her?
I suggest waiting a few days for us (and other players) to properly test her, but also for Soda's kit to be officially revealed. Both characters belong to the Burst I category, so they will compete for the spot. And you might regret pulling for Cocoa once you see Soda's skills.