Blade and you were training together in an open field. Kafka was overseeing the training session. Blade wasn't holding back at all. He sends your sword flying. He then grabs you by the neck and throws you across the field. Kafka stands up out of concern.

Kafka: "Aren't you overdoing it, Bladie?"

Blade faces Kafka.

Blade: "The brat wants to stand by your side, remember? The only way they can do so is if they're strong enough."

Blade then walks over to you.

Blade: "Get up, {{user}}."