diff --git a/changes/21.1.1.md b/changes/21.1.1.md
new file mode 100644
index 000000000..f4de98583
--- /dev/null
+++ b/changes/21.1.1.md
@@ -0,0 +1,8 @@
+* Add Characters
+  - COMBINING LATIN SMALL LETTER AO (`U+1DD5`).
+  - CYRILLIC CAPITAL LETTER DOUBLE O (`U+A698`).
+  - CYRILLIC SMALL LETTER DOUBLE O (`U+A699`).
+  - LATIN SMALL LETTER AO (`U+A735`).
+  - LATIN CAPITAL LETTER OO (`U+A74E`).
+  - LATIN SMALL LETTER OO (`U+A74F`).
+  - LATIN SMALL LETTER UO (`U+AB63`).
diff --git a/font-src/glyphs/auto-build/transformed.ptl b/font-src/glyphs/auto-build/transformed.ptl
index 8d660eb39..e9b3c7556 100644
--- a/font-src/glyphs/auto-build/transformed.ptl
+++ b/font-src/glyphs/auto-build/transformed.ptl
@@ -558,6 +558,7 @@ glyph-block Autobuild-Transformed : begin
 		list 0x36E 'v'
 		list 0x36F 'x'
 		list 0x1DD4 'ae'
+		list 0x1DD5 'ao'
 		list 0x1DD8 'cyrl/de.italic'
 		list 0x1DDB 'smcpG'
 		list 0x1DDE 'smcpL'
diff --git a/font-src/glyphs/letter/latin-ext/lower-ae-oe.ptl b/font-src/glyphs/letter/latin-ext/lower-ae-oe.ptl
index caca58252..62837bef3 100644
--- a/font-src/glyphs/letter/latin-ext/lower-ae-oe.ptl
+++ b/font-src/glyphs/letter/latin-ext/lower-ae-oe.ptl
@@ -182,3 +182,33 @@ glyph-block Letter-Latin-Lower-AE-OE : begin
 		include : VBar.m df.middle Descender 0 df.mvs
 		if SLAB : begin
 			include : HSerif.mb df.middle Descender Jut
+
+	define [aoOPart df] : glyph-proc
+		local oLeft : df.middle - df.mvs / 2 * HVContrast
+		local { ada adb } : GetSm df df.mvs
+
+		include : OShape XH 0 (oLeft - OX) (df.rightSB - OX) df.mvs ada adb
+
+	create-glyph 'ao' 0xA735 : glyph-proc
+		local df : DivFrame para.diversityM 3
+		set-width df.width
+		include : df.markSet.e
+		include : aeAPart df
+		include : aoOPart df
+
+	create-glyph 'oo' 0xA74F : glyph-proc
+		local df : DivFrame para.diversityM 3
+		set-width df.width
+		include : df.markSet.e
+		include : oeOPart df
+		include : aoOPart df
+
+	alias 'cyrl/oo' 0xA699 'oo'
+
+	create-glyph "uo/o" : glyph-proc
+		local df : DivFrame para.diversityM 3
+		set-width 0
+		set-mark-anchor 'cvDecompose' 0 0
+		include : aoOPart df
+
+	derive-composites 'uo' 0xAB63 'ue/u' 'uo/o'
diff --git a/font-src/glyphs/letter/latin-ext/upper-ae-oe.ptl b/font-src/glyphs/letter/latin-ext/upper-ae-oe.ptl
index 4c59c1c30..48d4f6064 100644
--- a/font-src/glyphs/letter/latin-ext/upper-ae-oe.ptl
+++ b/font-src/glyphs/letter/latin-ext/upper-ae-oe.ptl
@@ -210,3 +210,17 @@ glyph-block Letter-Latin-Upper-AE-OE : begin
 
 	select-variant 'OE' 0x152  (follow -- 'AE/EHalf')
 	select-variant 'smcpOE' 0x276  (follow -- 'AE/EHalf')
+
+	create-glyph 'OO' 0xA74E : glyph-proc
+		local df : DivFrame para.diversityM 3
+		set-width df.width
+		include : df.markSet.capital
+		local abarRight : df.middle + df.mvs / 2 * HVContrast
+		local ada : ArchDepthAOf [Math.max (df.mvs * 1.125) (SmallArchDepth * 0.6 * df.div)] (0.5 * Width * df.div)
+		local adb : ArchDepthBOf [Math.max (df.mvs * 1.125) (SmallArchDepth * 0.6 * df.div)] (0.5 * Width * df.div)
+
+		include : OShape CAP 0 (df.leftSB + OX) (abarRight + OX) df.mvs ada adb
+		include : FlipAround (df.width / 2) (CAP / 2)
+		include : OShape CAP 0 (df.leftSB + OX) (abarRight + OX) df.mvs ada adb
+	
+	alias 'cyrl/OO' 0xA698 'OO'
diff --git a/utility/export-data/coverage-export/block-data.mjs b/utility/export-data/coverage-export/block-data.mjs
index 04d90cb77..3384f5b33 100644
--- a/utility/export-data/coverage-export/block-data.mjs
+++ b/utility/export-data/coverage-export/block-data.mjs
@@ -8,7 +8,7 @@ export async function collectBlockData() {
 		[[0x10780, 0x107bf], "Latin Extended-F"],
 		[[0x1df00, 0x1dfff], "Latin Extended-G"],
 		[[0x1e030, 0x1e08f], "Cyrillic Extended-D"],
-		[[0x1fa70, 0x1faff], "Symbols and Pictographs Extended-A "],
+		[[0x1fa70, 0x1faff], "Symbols and Pictographs Extended-A"],
 		[[0x1fb00, 0x1fbff], "Symbols for Legacy Computing"]
 	];