The Tougro's Intimidation

It seems the Toguro Brothers spirit energy is so powerful, anyone looking at them or sensing them will be terrified. Yusuke was intimidated on how Younger Toguro's power is, the fact he survived Kuwabara's spirit sword (the fact he took the hit) and every time those two make eye contact, Yusuke shakes out of fear. Kuwabara was in shock on how he's still alive and saw he bring down a construction building. Even Hiei was nervous when he senses the brothers spirit energy in Ganzo's house where his sister Yukina was held prisoner.