That first fight with Ironhide and the following practice runs had allowed the two men to settle on a color scheme and name for their Jaeger.
The name they settle on is Sky Dancer for their Jaeger's speed when compared to everyone else. For the way she seemed to dance around their enemies- there and then gone before popping back into their guard.
The color scheme had been harder.
Eventually however, the two settle on a bright sunset orange and the vivid deep purple usually visible at dusk.
The designs painted onto their Jaeger are tribal in nature, swirls and lines that followed Sky Dancer's design all radiating from her chest. On the chest is a large Frangipani flower in full bloom that is bright orange at the center and vivid purple around the edges to match her color scheme with the black silhouette of a skylark in flight wings lifted high.
Tsuna still smiles to himself when he remembers the day they symbol on Sky Dancer's chest had been chosen.
Frangipani flowers were his Mama's favorites and Tsuna had loved them too. Hibari had known their meanings as well. The Frangipani stood for strength and grace. For the strength of will to stand and meet a challenge, for welcome. For immortality and perfection.
Tsuna had blushed when- in the Drift- he learned that Hibari associated Tsuna with the flower. For the welcome he had provided Hibari, for his determination and will to stand against those who should have beaten him only to win. For the grace that the two of them flowed with and the strong bond they shared with each other.
The Skylark was chosen for the symbolism of freedom and the Tsuna's and Hibari's determination to see the world free of the Kaiju. Tsuna had always associated Hibari with freedom- he'd laughed after finding out his namesake- and strength of will.
Sky Dancer then represents freedom, the strength to fight for it unendingly, for grace and the immortality of a human's will to live free.
Both boys are a little more in love with Sky Dancer by the time the design is placed on the Jaeger.
Tsuna even managed to get a picture of himself (laughing and looking at Hibari) and Hibari (scowling and glaring off to the left out of the shot) on one of the catwalks so they are positioned in front of Sky Dancer's chest.
The picture had been taken from directly across from them without their initial knowledge on the opposite catwalk the angle done so that the Jaeger's chest and head were gotten in the shot with both boys standing in front.
Chrome- who had taken the picture- had sent him two copies. Tsuna gets a third made and sends it back to his mother with his neat-ish handwriting on the back.
'My Partner Hibari Kyoya, me and Sky Dancer- the lovely robot I always wanted to be. (It even has the plasma cannons Mama).
Love you- Tsuna'
He frames the other two copies and gives one to Hibari.