Even with his eyes closed, Fein knows the location and placements of the trees, rocks, and insects around him in detail.
What he used just now was the bat's famous 'Echolocation'! Though, he found out that it was a bit tasteless since his powerful perception can achieve the same effect.
"Since the result was satisfactory, it's time for me to go home. Thank you for your hard work!" Fein walked to his partner with a smile and hugged him. "I'll be back next week. Then we will work together to make the perfect gene serum compatible with you."
Brick smiled and gave Fein a manly hug. "Bastard, don't make me wait too much."
"Yeah, I'll make sure to come back early. Since we will find my missing friend after that."
"You still didn't find where he was? Didn't the main branch send their most elite intelligence unit to track him?" Brick asked with doubt.