Lero-Ro

Leo-Ro is a Ranker who help proctoring the tests on the second floor. He is supposedly smarter than Quant, and is skilled in the use of Shinsoo. He is also the Light Bearer trainer.

Appearence and Personality
Leo-Ro is a human-looking individual with yellow hair and two black spots under his eyes. His choice of clothing is that of most test proctors: a white lab coat with black trousers and gloves. He wears his in a fashion that makes his upper legs appear rather large.

He is a fairly normal and easygoing Ranker. He is somewhat inquisitive about people. He had trouble considering whether or not he should let Koon pass the hide-and-seek test, because although it was obvious Koon was brilliant, he considered him dangerous.

Plot Summary
Leo-Ro proctored the tests on the Second Floor with the other Rankers. He talked to the Regulars just after they teamed up, then flung a Shinsoo barrier at them. When Baam was not pushed back by the barrier, Leo realized that he had "another monster," and agreed to let him pass. He sat with Baam and watched as the other Regulars try to get through the barrier. They made a bet over who would pass through the barrier first, with the winner having the opportunity to ask the loser a question. However, they both betted on Anak and both proved to be right. Leo conceded the bet to Baam, who asked him what an Irregular was. Leo-Ro duly replied, then, when all the Regulars had gotten through, he left them to the next test.

Later, he acted as the trainer for the Light Bearers. He watched the hide-and-seek test silently, and saw Koon's whole scheme through his Lighthouse. He had difficulty deciding on what to do with Koon, which Yu Han Sung only made worse by talking to him in a cryptic and menacing way. He then began to watch Team B's test.