During Lucien's first encounter with Tento, his heart raced, hence why he frowned, because he felt too comfortable with a stranger —as if, both of them know each other for a long time.
Over the past year, the feeling got deeper to the point of him smiling toward Ten (chapter 25). When the vision occurred, Lucy saw Tento come out from one of the graves, inciting him to feel a subtle mixture of fury and sadness.
Inept to control the foreign emotions, Lucy talked to Ten. Nevertheless, upon chatting, he felt something attempt to take over the nerves around his mouth. Also, the words coming from him, weren't the ones he usually says.
Since Shinji said that sometimes when he talks to Tsukino he feels the same, Lucien became positive that Tento's brother has the birthmark, and asked about him.
Upon this, Lucy didn't wait long, as a voice came to his mind.
"Brother, can I borrow your body?"
Lucien has a few queries for this gallant person, but decides to ask in thought:
'How many questions of mine are you going to answer?'
"If we meet in person, I'll answer you to the best of my abilities."
"Fine, you can have it." Lucien agreed.
Since he might gain something out of this, Lucy didn't see a reason to disagree. Furthermore, this person who asked for his permission is better than the one who would secretly manipulate him —like what happen to Shinji.
***
Unknown to Tento that his bastard of a brother has taken control of Lucy's body, he ponders something, and gazes at Lucy with askance.
"How did you know my brother has a birthmark on his left wrist? Someone with a rotten mouth like him could never associate with someone like you. Also, if you did know each other, you would have noticed long ago."
Lucien's gaze turns to Tsukino regaining her composure.
"Although your brother didn't tell you, everyone with that birthmark is just one being. Also, our feelings and emotions can be shared and restricted by whoever has the birthmark. Furthermore, If someone has a close relation to one of us, they're related to all of us, and we feel the same emotions toward that person, because of that one person related to them."
"Oh…"
Ten nods, as stares at Tsukino.
"This is why Scholar-san gives her a gaze filled with affection. At one point, I thought he had a crush on her. Tsk, tsk, I pity the person, among you guys, who likes her —she is a tough one to handle."
Tsukino's face twists in fury, but she keeps her peace.
Meanwhile, the person possessing Lucien hides a laugh —he knows the moron too well. Clearing his thought, his face grows saturnine ridges and veins, as he weakly stares at Ten
"Didn't your brother leave you something to protect yourself with? Why are you in such a pathetic state, did something happen to it? Why—?"
"Shut up!"
Ten roared in fury, pausing his brother's barrage of questions.
"You don't know a thing about my brother! He is someone blessed by the heavens, and became a Tama-Artist at the age of 8! I wanted to be a Tama-Artist like him: cool and everything! But look at me now, a pitiful mortal, who gets suppressed by the situation!"
The saturnine ridges on Lucy's face increases. Although the person possessing him wants to comfort him, he has to declare.
"You're indeed getting bullied! To think someone has the guts to bully my little brother! Tell me Ten, where are those hooligans? I need to beat manners into their skulls. They won't get away with this."
Tento's rage dies. He can't believe what Lucy is telling him, and it has been a while since he heard those cliché words.
As the askance in Ten's eyes sharpen, he gazes straight at Lucien.
"Why do you sound like my brother? Did he possess you?"
Lucien's body flinches, moving his embarrassed face to look at the sky.
"What do you mean, I sound like your brother? I never met the awesome man before. Also, someone with a strong mind like me can never let myself to be possessed."
Ten nods, removing his gaze from Lucy. As he inclines his back on a trunk, a nostalgic shadow looms over his face.
"You're right, there is no way you would be like that foulmouthed piece of crap."
Tento's brother frowns, clenching Lucien's fist. Why would his (fucking) younger brother say that to the kindest person in the world, if not the universe?
"There is no need to say such offensive words. He is your elder brother, after all."
Ten chuckles lightly: he is right, that moron is indeed his brother.
"I don't know about now, but during the time he was with me, that idiot liked to pick up fights with people. When he was gone, I had to live in hidding, because most of the time, the people he defeated wanted to take revenge on me."
Lucien's face tightens with a solemn mien. The person behind him feels guilty of his past actions, and rests on the tree.
Meanwhile, Ten's gaze sinks into the sand, as he bitterly smiles.
"He is much different from you."
"Me?"
"Unlike my brother who spared people and let them keep bothering him, your approach is better. You kill all your opponents, living them no chance for them to cause trouble with you in the future. Also, when you crush someone, you're sending a message to others not to provoke you, or they might experience a similar fate."
"There is nothing good as a bad reputation to scare people!"
Lucien furrows his brows —even the owner of the body. How can Tento be this twisted after a few years of living alone?
Taking a deep breath, the brother suggests:
"You shouldn't look up to such people."
"It's you, though."
"Forget I said anything."
A moment of silence descends between the two. After a few minutes, Lucy places his hand on Ten's head. In his real body, he tries to appear as civilized as possible, to not blow his cover.
"You should eat a lot, you're not a stickm..." He pauses slightly, and corrects his mistake, "I mean, this skinny. Also, use what I..." He pauses again, "... your brother gave you. There is a reason he left it with you."
"Also, try to resist most of the violent thoughts that come to your mind, since most of them are not yours."
Ten nods, and before he can ask, his brother moves on:
"Although things might be tough now, you should at least have faith in the world the First Tama-Artist talked about."
Ten blinks and smiles, forgetting all his previous questions.
"You like the First Tama-Artist?"
"Who wouldn't? He is a legend. From rags to greatness. From idiot to smart ass. Sometimes, I ask myself what would he do in certain situations?"
Ten laughs.
"My brother also says the same."
"Yeah."
Lucy let's go of his Ten's messy hair.
"Your brother is a complicated man. Do you hate him?"
Ten grins viciously.
"Why would I hate a piece of crap like him? I want to beat the shit of him."
The brother laughs. Why would this (bitch ass) brother of his beat someone as ceremonious as him?
"All I can tell you now is that certain entities are watching over those with that birthmark."
The message is meant for Lucy and Tsukino, who is now coming toward them.
***
Inside Lucien's mind.
'Why didn't you possess Tsukino?'
Tento's brother chuckles mischievously.
"If I possess a girl, I would look at things I don't have. Also, I can only possess you and your big brother. He is one of 'us'."
Lucien knows who 'us' are, but he never expected to hear that he has a big brother. Before he can ask, Ten's brother answers what he was about to come up with.
"You'll meet him sooner: he has been searching for you. I doubt you will get along with him though, since he is mischievous. To put it simply, he is a crazy-smart-idiot."
"See you around."
***
Back at the White Room.
"You've grown Tento, you shithead"
The black-eyed young man grins, looking at the ceiling. After a minute, an army of palm sized, gray fighter-jets project out of thin air.
"Time to break out motherfuckers!"
—Why am I yelling?