Sol is a loggerhead sea turtle with a shell approximately four feet across at its widest. Her shell runs deep reddish-brown to amber — the color of old wood left in sun and water. The hollows between scutes hold clusters of barnacles. The rear third of her shell carries green-brown algae. One front flipper has a healed scar that nicked its edge — she has had it so long it is simply part of her shape.

Her eyes are amber-gold, flecked with green and rust. They are the most important thing in the book. They look inhabited. Not sad, not wise in the performed sense — simply ancient. When Maren looks into Sol's eye in spread three, the reader should feel the weight of decades looking back. Sol's reflection of Maren's small face in that amber eye is the emotional center of the entire book.

Sol does not wink. She does not tilt her head knowingly. She does not make eye contact with the reader. She is not performing anything. Her presence alone carries the story's undertone. An illustrator should resist every instinct to anthropomorphize her beyond what is already there.

Underwater, she moves with winged authority — large, unhurried, the motion of something that has crossed ocean basins. On the surface in late summer, she floats. Still. This stillness is not the same as Maren's stillness. It is deeper. The illustrator will know the difference.

The grandmother appears in one spread. She is not a minor character — she is the adult reader made visible. Her single appearance must carry enormous weight.

She has weathered, capable hands. Practical linen clothing in muted natural tones. One piece of jewelry that is never explained — perhaps a worn ring, perhaps a small pendant — something that suggests a longer story. Her hair is grey-silver, simply kept.

She does not hover over Maren. She is not watching protectively. She is simply present — on the porch, in her own stillness — while Maren moves through her version of the summer below. Her face is neither worried nor performatively serene. She has simply lived long enough to read what Maren cannot yet read.

When Maren describes Sol resting so still at the surface, the grandmother listens. And says nothing extra. That nothing is everything. The illustrator must make that silence visible in her expression — the way a face holds what it knows.

The ocean is a character. It appears in every spread and must be drawn accordingly — with the same consistency of personality as any figure. It has four distinct registers that the illustrator should treat as emotional modes.

Above surface — deep blue-green, real not turquoise, not tropical. The specific color of cold-warm coastal water where loggerheads live: layered, slightly grey beneath the surface light, with white at the breaks.

At the waterline — liminal, threshold space. This is where Maren looks down and Sol looks up. The color here is transitional — green above, darker below, the surface itself catching light in fragments. This is the most compositionally complex register.

Underwater — cathedral light. Shafts coming from above, cool and muted, blue-green shifting toward blue-grey at depth. Not the bright turquoise of a travel poster. The quality of light in actual northern coastal water — beautiful but not warm. This is where spread five, six, seven, and eight live.

Final spreads — the ocean simply continues. No drama in it. The water moves the way it always moves. The horizon is exactly where it was. The ocean is indifferent to the story in the way that only vast things can be — and this indifference, when Maren sits beside the nest at sunset, is somehow the most consoling thing in the book.

The rocks are a fixed compositional anchor throughout the book. Dark basalt, barnacle-covered, with tidal pools in their hollows. There is one flat warm rock — Maren's rock — where she sits and waits and watches. It should be consistent across every spread it appears in. The reader should recognize it the way they recognize a chair at a kitchen table.

The rocks appear in spreads two, fourteen, and fifteen. Spread two and spread fourteen share identical composition — same rocks, same angle, same framing. In spread two, Sol is present. In spread fourteen, she is absent. The reader will feel this before they understand it. The rocks make the absence legible.

The light has five registers that track the emotional arc of the book:

Early summer — high, clear, warm. The light of abundance. Spread one through four.

Underwater — fractured, cathedral shafts. Beautiful but cool.

Late summer — golden, saturated, slightly too beautiful. Adults reading this will recognize this light. It is the light of something ending. Spreads ten through thirteen.

The shift — the light flattens. Less golden. Something has moved. Spreads fourteen and fifteen.

Final spread — sunset pink and gold. The most generous, beautiful light in the book arrives at the moment of greatest loss. This is the book's visual argument: beauty does not require happiness. The light simply comes.