Dio didn't transform to his dinosaur form and trained in his human form. He put on high-density weights and started to swim around the beach. He put the weight of 100 kg on both of his hands and legs making it quite hard to swim. His strength only increased when he transformed into a dinosaur.
He wanted to increase his raw strength training in the sea.
Swimming is a perfect exercise since it moves all of the muscle inside his body.
He also dived inside the sea feeling the pressure that pressed his body in the 20 meters deep and he needed to get up since he swam without any protection or equipment.
Human is different from an animal that is living in the sea since their ribs are very rigid compared to a fish, for example, a whale, it can withstand dramatic pressure changes because their bodies are more flexible. Their ribs are bound by loose, bendable cartilage, which allows the rib cage to collapse at pressures that could easily snap our bones.
A whale's lungs can also collapse safely under pressure, which keeps them from rupturing. This allows s.p.e.r.m whales to hunt for giant squid at depths of 7,000 feet or more.
Brando could dive normally with his mosasaurs form but he didn't do that since it wouldn't be training that way. He continued to swim around and decided to visit the sacred place in this town. He was curious about the underneath whirlpool.
He might become the real legend when he turned into mosasaurs and turned into the dragon in the legend. He chuckled and started to swim there. He might as well come to go for a treasure hunter searching for a treasure in the deep sea.
---
Chika was resting after she had trained in dancing and singing.
"Eh? Brando is here?"
The members of Aquors were surprised when they heard it. They didn't meet him again after their concert since they went back directly. They would have never thought that he would be coming here.
"He seems to be coming by chance since he wants to train," Chika said.
"Training? What kind of training?" You asked.
"There will be a U.A. Sports Festival in 10 days or so, right? He was coming to the sea to train his body," Chika said.
"Traning in the sea?!" They knew that he was coming from the hero department but they didn't expect him to suddenly far away from Tokyo to Numazu.
"Who is Brando that you've talked to earlier?" Mari asked.
"He is our fan in Tokyo," Chika seemed proud when she saw those words to her.
"What?! Fans?!" Mari was surprised.
"Are you sure that he is our fan? I don't think he was your fan from your interaction earlier," Kanan said suspiciously.
"No, he is our fan!" Chika definitely didn't want to lose her fans.
"I'm not sure if he is our fan, he might help to vote us because we're acquaintances but he might not be our fans," Riko said.
"Riko-chan...." Chika didn't expect her friend to betray her.
"Wait? Brando? Is it a boy or a girl?" Dia suddenly asked with a red face. She suddenly started to imagine a lot of things.
"He is a boy," Chika said.
"...." Dia blushed and hurriedly said her trademark words and said, "Bzzt bzzt, you can't have a relationship with a boy when you're an idol!"
"Dia, you're too stiff," Kanan said.
"Ah, Dia, you've never contacted with a boy, right? That's why you're a bit nervous!" Mari said.
"Eh? Is that true?!" Everyone looked at her with a surprised expression.
"W - What's wrong with that?!" Dia blushed and asked, "What about you? Do you even have experience?" She pointed her finger at Mari.
Mari looked away but still said, "Yes, of course....."
"Really?" Dia stared at her really close.
Mari sighed and said, "I don't...."
Dia seemed quite satisfied with her answer.
"Do you want to visit my house later?" Chika suddenly said.
"Huh?"
"I mean, we can talk about our training later and you can meet him too," Chika said.
"Oh, the demon lord has descended upon us," Yoshiko said with her usual pose.
"It's Brando, not the demon lord, zura," Hanamaru said.
"Yoshiko-chan...." Ruby said with a pitiful expression.
"W - What's with that expression?!" Yoshiko complained.
"Then let's go! He is also a good singer, he might have good advice for us," Chika said.
"A good singer? Is he playing in a band or something?" Dia asked.
"No, but he has won a singing competition," Chika said.
"Chika-chan, is it okay to trouble him that much? Isn't he coming to the train? Aren't we going to trouble him?" You asked.
Chika thought for a bit and said, "Let's just ask!"
"..." They were speechless looking at her.
---
Brando was swimming quite far and he had reached the sacred place in this sea, 'She isn't lying.' He saw a massive whirlpool 40 meters under the surface of the sea. He didn't dare to get close since he could feel that the whirlpool tried to pull him inside. He could see some fish that was trying to escape from the whirlpool but it was useless since the fist was sucked inside the whirlpool. He was purely amazed at the power of this whirlpool. He observed the whirlpool swimming around 100 meters away from it since he needed to be careful.
There isn't much of an animal around this whirlpool, it might be their instinct that tells them to escape from this place.
Brando thought of what made a whirlpool a powerful natural force on this earth, 'Hmm, an attraction force? No.' He thought for a bit and suddenly realized something, "Spin!"