In the end, Chrom's meeting had been brief, merely assigning the watch schedule for the perimeter and allotting a large room of paper and desks in the west wing to Robin, so that he could have adequate space to plan and map out the next movement of the Shepherds. Robin and Virion made quick work of moving Robin's equipment, both combat and tactical, to the west wing, talking about some "game" that they were playing that Virion was consistently winning, much to Robin's chagrin.
As the meeting broke up, and everyone went their separate ways, Lucina was still struck by the enduring notes of "Love's Philosophy," both as as an objectively beautiful song, but more so as a demonstration of Inigo's hidden talent. Her mind raced through every memory she had of Inigo, trying to remember a single time she had ever heard him sing. Much like she confirmed with Severa several days earlier, she truly had not heard her brother's singing voice before. To hear it now, and for it to be so inexplicably spectacular, sent a strange feeling through her very being.
She needed to talk to someone about this, that much was sure. Lucina was always direct and honest with people, for better or for worse, and hated any idea of letting unhandled emotions or thoughts stew within herself. That being said, the amount of people she could talk to was limited. For one, as far as she knew, only herself, Owain, and Inigo himself had ever heard Inigo sing. While speaking to either of them might have been the most direct route, there was also a note of embarrassment. Surely Owain and Inigo had pieced together that she had spied on them while they were making music, and to just brazenly walk up to them and begin pestering them with questions seemed far too forward.
Inigo was famously shy, especially when it came to his talents and abilities (with the single exception of flirting). The only reason she knew he liked to dance is because their mother was his instructor; she doubted she would have ever seen him pirouette otherwise. That he would hide his composing and singing ability was not all that surprising. Owain, however, presented another problem. It was well known that Owain was an open book, and that only a small amount of prodding (especially from someone like his mother Lissa or his father Gaius) would lead him to tell every secret he knew. The fact that he kept the secret with Inigo was something Lucina debated with herself at end. Was it really possible she was the only person that had ever heard her brother sing and her cousin play along? Heard one of what seemed to be many unique compositions?
Her parents probably knew, but the sad truth was the only Chrom and Olivia she had access to had not yet raised Lucina and Inigo, and certainly would not know anything about it in the current day. She wracked every corner of her brain, thinking of anyone who might know. Then, a recent memory struck her. Severa had asked if Inigo had ever sung before. She had accepted her answer then, but...perhaps she was asking because she had heard it, and was merely fishing for someone else who had heard it to talk about it!
'Yes, it all makes sense now! Severa assumed that, as his sister, I would know!' Lucina thought. Her mind filled with resolve, and she left to find Severa to talk about Inigo's hidden talents. However, the more she thought about it, the more came to wonder how exactly Severa had heard Inigo sing. It was possible that Lucina was jumping to conclusions, in which case if she asked directly, she would be revealing a secret Inigo cared so much for he managed to get even Owain to keep it under lock and key. She could not bear to do that, so she decided to ask Severa in the most careful way possible.
...
Severa was walking through the sea of tents and equipment that was being moved throughout the courtyard as the Shepherds worked to establish the chateau as a viable fortification. Her mother asked her to bring up a box of her and Gregor's things from a storage crate, and for all her display of displeasure, she really had no problem assisting her parents in such a trivial task. It was still strange for her to even see her parents, looking younger but still definitely like her parents, and the emotions she felt, both positive and negative, still needed sorted out.
As she was carrying a box that distinctly smelled of alcohol ('thanks, dad,' she thought) Severa noticed Lucina approaching her rapidly, her face not clearly good or bad but surely looking determined. Severa's mind flashed back to several days ago, and imagining the worst, Severa began to quicken her pace toward her parents' tent.
Lucina, unburdened by the weight Severa was carrying, quickened her pace as well, and soon Severa was nearly running through the crowds, the box cradled in her chest as she raced ahead. Lucina was no less undaunted, swiftly moving ahead through the mass of soldiers and their aides. "Severa!" Lucina cried. Severa realized Lucina, her superior even in the future, was calling for her now, and she lost all plausible deniability that she was in a hurry and just did not see Lucina coming. She stopped and turned around, a few beads of sweat rolling down her forehead.
Lucina approached. "Thank goodness I found you," she said. "Listen, about our conversation the other day, the one regarding my brother..."
'Oh no,' Severa thought.
"...I was just in the east wing with Inigo and Owain..."
'No! What did those idiots say!'
"...And I learned something about Inigo that I had never known before..."
Severa was shaking now, her mind racing with images of Lucina's prowess on the battlefield. They had known each other forever though. She would not really hurt her over a misunderstanding with her brother...would she?
"You see," Lucina said, her voice pausing, as if she could not find the right words, "it appears as though my brother might have been keeping something from me, something he has only shared openly with Owain, and something I overheard just about an hour ago." Lucina stepped closer to Severa, looking around to see if anyone was listening, and Severa realized that the crowd that she ran through had since scattered, leaving virtually no one paying attention to their conversation. "I was thinking about it since then, and I think you might know what I am talking about."
Severa, paralyzed with fear, stood motionless as Lucina stepped even closer. "Do you know, Severa?" she said, "Are you understanding what I am imply-"
"Severa!"
Severa and Lucina turned toward the sound, which was Cordelia, her mother, waving her hand to call her daughter over with her box. Severa turned back to Lucina. "I'm sorry," she said, "I-I have to deliver this to my parents."
"Well, that-" Lucina said, before realizing Severa was racing toward her mother at a full sprint. Clearly whatever she was delivering was quite important, and Lucina mentally scolded herself for impeding her. The world does not stop, after all, because Lucina heard her brother sing. She stepped away toward the courtyard again, thinking that perhaps she should just let it go. After all, what did it matter if Inigo could sing, or that he was composing music with Owain? He was entitled to a life outside of her, outside of the war for that matter. She went to Robin's new base of operations in the chateau, deciding to make herself useful in the daylight that remained assisting the tactician in organizing his latest plans.
Severa, meanwhile placed the box down before her mother and leaped into her arms, hugging her tightly both out of gratitude and primordial fear. Cordelia, confused by this out of character action, nevertheless returned the hug in full force, savoring the feeling of resting her cheek on her daughter's head in comfort, regardless of what spurred it on.