Kanji Translation
The scroll contains two main kanji characters with a flowing connector between them.

誓 (sei / chikai): This character means "vow," "pledge," or "oath."

行 (gyō / okonai): This character means "practice," "action," or "conduct."

Together, they represent the central theme of the illustration: making a vow and then fulfilling it through practice or action. This is directly reflected in the English text below, where the king declares his intention to change his behavior.

Gemini's thinking

Analyzing the Core Elements
I'm now breaking down the request into key components. I need a square illustration using Japanese Buddhist iconography. I've noted the stylistic details and have a clear understanding of the need to exclude specific Buddhas, particularly Amida Nyorai, to stay focused.

Defining the Key Concepts
I am now focusing on refining the central concept. My process now involves extracting the fundamental elements. I have a firm handle on the exclusion criteria and central characters for the illustration. I am organizing the information to craft a visual narrative that meets the criteria. I'm carefully considering the required symbolic elements to achieve the desired impact.

Formulating the Composition
I am now focusing on the composition, having set the overall concept. I've defined the key figures as the King, Buddha (avoiding the exclusions), and the sons. The setting will be a stylized temple garden, and I'm adding symbolic elements for "purification" and a vow. My plan involves a nihonga-style painting with muted colors and gold accents, using aged paper. A few kanji characters are planned for a cartouche.

Analyzing Image Compliance
I'm checking the illustration now. It appears to match the user's criteria for depicting the vow of King Wonderful-Adornment, using a Japanese Buddhist art style and avoiding the specified elements. The limitations on text also seem to be respected, based on the requirements.

Confirming Art Style Adherence
I've confirmed that the square illustration satisfies the user's explicit instructions. Specifically, the art style is in line, and the prohibited elements are omitted. The text limitations have also been addressed. The depiction aligns with the user's specific request for the vow of King Wonderful-Adornment.