Jaune's semblance is said to be like a shield; having a full body armor/shield would probably be the most practical way to look at it. But i can see him also being able to conjure a sort of light based shield around himself and/or someone else, too. But a "Blade Charge", hmm, i guess although im mostly keeping to Jaune's defense and protect affinity, but thats not to say he could have that ability.