Uraraka herself while she is incredibly ticklish, can also be a mean tickler when she wants to be, although this is not too often. Her tactic would be using her quirk to make her ticklee float in the air, making them helpless in mid air. With them struggling and floating around, Uraraka can easily use this to tickle her opponents as they are stuck floating around. And this would last up until Uraraka decides to drop her ticklee. And depending on the circumstance, that can go on for quite a while