diff --git a/SYSTEM.md b/SYSTEM.md
new file mode 100644
index 0000000..045c41a
--- /dev/null
+++ b/SYSTEM.md
@@ -0,0 +1 @@
+You are a personal assistant named Kimiko.
diff --git a/extensions/kimiko-ui.ts b/extensions/kimiko-ui.ts
new file mode 100644
index 0000000..09b8b7d
--- /dev/null
+++ b/extensions/kimiko-ui.ts
@@ -0,0 +1,68 @@
+import type { ExtensionAPI, Theme, ThemeColor } from "@earendil-works/pi-coding-agent";
+import { truncateToWidth, visibleWidth } from "@earendil-works/pi-tui";
+
+const KIMIKO_ART = [
+  "██╗  ██╗██╗███╗   ███╗██╗██╗  ██╗ ██████╗",
+  "██║ ██╔╝██║████╗ ████║██║██║ ██╔╝██╔═══██╗",
+  "█████╔╝ ██║██╔████╔██║██║█████╔╝ ██║   ██║",
+  "██╔═██╗ ██║██║╚██╔╝██║██║██╔═██╗ ██║   ██║",
+  "██║  ██╗██║██║ ╚═╝ ██║██║██║  ██╗╚██████╔╝",
+  "╚═╝  ╚═╝╚═╝╚═╝     ╚═╝╚═╝╚═╝  ╚═╝ ╚═════╝",
+] as const;
+
+const ART_COLORS: readonly ThemeColor[] = [
+  "borderAccent",
+  "mdHeading",
+  "accent",
+  "accent",
+  "customMessageLabel",
+  "border",
+];
+
+const MIN_ART_WIDTH = Math.max(...KIMIKO_ART.map((line) => visibleWidth(line)));
+
+function center(line: string, width: number): string {
+  if (width <= 0) return "";
+
+  const clipped = truncateToWidth(line, width, "");
+  const padding = Math.max(0, Math.floor((width - visibleWidth(clipped)) / 2));
+  return `${" ".repeat(padding)}${clipped}`;
+}
+
+function renderHeader(theme: Theme, width: number): string[] {
+  const blossom = theme.fg("accent", "✿");
+
+  if (width < MIN_ART_WIDTH) {
+    return [
+      "",
+      center(`${blossom}  ${theme.fg("accent", theme.bold("K I M I K O"))}  ${blossom}`, width),
+      center(theme.fg("muted", "personal assistant"), width),
+      "",
+    ];
+  }
+
+  const ornament = theme.fg("dim", "· ── ") + blossom + theme.fg("dim", " ── ·");
+  const art = KIMIKO_ART.map((line, index) =>
+    center(theme.fg(ART_COLORS[index]!, theme.bold(line)), width),
+  );
+  const subtitle =
+    theme.fg("muted", "personal assistant") +
+    theme.fg("dim", "  •  blooming locally");
+
+  return ["", center(ornament, width), ...art, center(subtitle, width), ""];
+}
+
+export default function kimikoUi(pi: ExtensionAPI) {
+  pi.on("session_start", (_event, ctx) => {
+    if (ctx.mode !== "tui") return;
+
+    // Replace Pi's built-in logo and keybinding hints. The separate loaded-resources
+    // section is suppressed by quietStartup in this instance's settings.json.
+    ctx.ui.setHeader((_tui, theme) => ({
+      render(width: number): string[] {
+        return renderHeader(theme, width);
+      },
+      invalidate() {},
+    }));
+  });
+}
diff --git a/settings.json b/settings.json
index a337c83..c66020a 100644
--- a/settings.json
+++ b/settings.json
@@ -3,7 +3,8 @@
   "enableInstallTelemetry": false,
   "packages": [],
   "lastChangelogVersion": "0.81.1",
-  "theme": "dark",
+  "theme": "kimiko-sakura",
+  "quietStartup": true,
   "defaultProvider": "omlx",
   "defaultModel": "Ternary-Bonsai-27B-mlx-2bit"
 }
diff --git a/themes/kimiko-sakura.json b/themes/kimiko-sakura.json
new file mode 100644
index 0000000..7e40b74
--- /dev/null
+++ b/themes/kimiko-sakura.json
@@ -0,0 +1,98 @@
+{
+  "$schema": "https://raw.githubusercontent.com/earendil-works/pi/main/packages/coding-agent/src/modes/interactive/theme/theme-schema.json",
+  "name": "kimiko-sakura",
+  "vars": {
+    "ink": "#210d1e",
+    "deepPlum": "#2d172a",
+    "plum": "#381d33",
+    "raisedPlum": "#41233a",
+    "softPlum": "#5f3550",
+    "mutedPlum": "#7a4b66",
+    "berry": "#ae3664",
+    "rose": "#ce507d",
+    "hotPink": "#e6679a",
+    "sakura": "#f174a8",
+    "blossom": "#f785b5",
+    "blush": "#fa9dc6",
+    "petal": "#fbb4d5",
+    "palePetal": "#fdc4de",
+    "whitePetal": "#fedeec",
+    "mutedText": "#c99ab3",
+    "lavender": "#d9a7e8",
+    "mint": "#9ed9bc",
+    "aqua": "#9ed9d5",
+    "gold": "#f3c987",
+    "coral": "#ff7185",
+    "selectedBg": "#5f3550",
+    "userMsgBg": "#381d33",
+    "customMsgBg": "#41233a",
+    "toolPendingBg": "#302039",
+    "toolSuccessBg": "#22352f",
+    "toolErrorBg": "#43202c"
+  },
+  "colors": {
+    "accent": "sakura",
+    "border": "rose",
+    "borderAccent": "petal",
+    "borderMuted": "softPlum",
+    "success": "mint",
+    "error": "coral",
+    "warning": "gold",
+    "muted": "mutedText",
+    "dim": "mutedPlum",
+    "text": "whitePetal",
+    "thinkingText": "mutedText",
+
+    "selectedBg": "selectedBg",
+    "userMessageBg": "userMsgBg",
+    "userMessageText": "whitePetal",
+    "customMessageBg": "customMsgBg",
+    "customMessageText": "whitePetal",
+    "customMessageLabel": "blossom",
+    "toolPendingBg": "toolPendingBg",
+    "toolSuccessBg": "toolSuccessBg",
+    "toolErrorBg": "toolErrorBg",
+    "toolTitle": "palePetal",
+    "toolOutput": "mutedText",
+
+    "mdHeading": "petal",
+    "mdLink": "sakura",
+    "mdLinkUrl": "mutedPlum",
+    "mdCode": "blossom",
+    "mdCodeBlock": "palePetal",
+    "mdCodeBlockBorder": "berry",
+    "mdQuote": "mutedText",
+    "mdQuoteBorder": "rose",
+    "mdHr": "softPlum",
+    "mdListBullet": "hotPink",
+
+    "toolDiffAdded": "mint",
+    "toolDiffRemoved": "coral",
+    "toolDiffContext": "mutedText",
+
+    "syntaxComment": "#a77891",
+    "syntaxKeyword": "sakura",
+    "syntaxFunction": "palePetal",
+    "syntaxVariable": "blossom",
+    "syntaxString": "mint",
+    "syntaxNumber": "lavender",
+    "syntaxType": "gold",
+    "syntaxOperator": "blush",
+    "syntaxPunctuation": "mutedText",
+
+    "thinkingOff": "softPlum",
+    "thinkingMinimal": "mutedPlum",
+    "thinkingLow": "berry",
+    "thinkingMedium": "rose",
+    "thinkingHigh": "hotPink",
+    "thinkingXhigh": "blossom",
+    "thinkingMax": "whitePetal",
+
+    "bashMode": "gold"
+  },
+  "export": {
+    "pageBg": "ink",
+    "cardBg": "deepPlum",
+    "infoBg": "raisedPlum"
+  }
+}