diff --git a/Prezel/core/designsystem/src/main/java/com/team/prezel/core/designsystem/component/actions/button/config/PrezelButtonBase.kt b/Prezel/core/designsystem/src/main/java/com/team/prezel/core/designsystem/component/actions/button/config/PrezelButtonBase.kt
index 1fc2ab9f..361b124f 100644
--- a/Prezel/core/designsystem/src/main/java/com/team/prezel/core/designsystem/component/actions/button/config/PrezelButtonBase.kt
+++ b/Prezel/core/designsystem/src/main/java/com/team/prezel/core/designsystem/component/actions/button/config/PrezelButtonBase.kt
@@ -7,6 +7,7 @@ import androidx.compose.foundation.border
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.size
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -132,7 +133,9 @@ private fun Modifier.buttonContainer(
     config: PrezelButtonDefault,
 ): Modifier =
     this
-        .clip(shape = config.shape)
+        .then(
+            config.textButtonHeight?.let { Modifier.height(it) } ?: Modifier,
+        ).clip(shape = config.shape)
         .background(color = config.backgroundColor(enabled = enabled))
         .then(
             if (config.hasBorder) {
diff --git a/Prezel/core/designsystem/src/main/java/com/team/prezel/core/designsystem/component/actions/button/config/PrezelButtonDefaults.kt b/Prezel/core/designsystem/src/main/java/com/team/prezel/core/designsystem/component/actions/button/config/PrezelButtonDefaults.kt
index 5be2c220..1bb13264 100644
--- a/Prezel/core/designsystem/src/main/java/com/team/prezel/core/designsystem/component/actions/button/config/PrezelButtonDefaults.kt
+++ b/Prezel/core/designsystem/src/main/java/com/team/prezel/core/designsystem/component/actions/button/config/PrezelButtonDefaults.kt
@@ -28,6 +28,7 @@ data class PrezelButtonDefault(
     val contentPadding: PaddingValues,
     val iconSpacing: Dp,
     val iconSize: Dp,
+    val textButtonHeight: Dp?,
 ) {
     val hasBorder: Boolean = borderWidth > 0.dp
 
@@ -66,6 +67,7 @@ object PrezelButtonDefaults {
         contentPadding: PaddingValues = getContentPadding(size = size, isIconOnly = isIconOnly),
         iconSpacing: Dp = getIconSpacing(size = size),
         iconSize: Dp = getIconSize(size = size),
+        textButtonHeight: Dp? = if (isIconOnly) null else getTextButtonHeight(size = size),
     ) = PrezelButtonDefault(
         contentColor = contentColor,
         disabledContentColor = disabledContentColor,
@@ -79,8 +81,17 @@ object PrezelButtonDefaults {
         contentPadding = contentPadding,
         iconSpacing = iconSpacing,
         iconSize = iconSize,
+        textButtonHeight = textButtonHeight,
     )
 
+    @Composable
+    private fun getTextButtonHeight(size: ButtonSize): Dp =
+        when (size) {
+            ButtonSize.XSMALL -> 28.dp
+            ButtonSize.SMALL -> 36.dp
+            ButtonSize.REGULAR -> 48.dp
+        }
+
     @Composable
     private fun getContentColor(
         type: ButtonType,
diff --git a/Prezel/core/model/src/main/java/com/team/prezel/core/model/profile/Nickname.kt b/Prezel/core/model/src/main/java/com/team/prezel/core/model/profile/Nickname.kt
index 15a3e54b..055c8565 100644
--- a/Prezel/core/model/src/main/java/com/team/prezel/core/model/profile/Nickname.kt
+++ b/Prezel/core/model/src/main/java/com/team/prezel/core/model/profile/Nickname.kt
@@ -23,6 +23,8 @@ value class Nickname private constructor(
     companion object {
         const val MAX_LENGTH = 10
         private const val MIN_LENGTH = 2
+        private const val DIGIT_START = '0'.code
+        private const val DIGIT_END = '9'.code
         private const val LATIN_UPPERCASE_START = 'A'.code
         private const val LATIN_UPPERCASE_END = 'Z'.code
         private const val LATIN_LOWERCASE_START = 'a'.code
@@ -46,7 +48,8 @@ value class Nickname private constructor(
         }
 
         private fun isAllowedCodePoint(codePoint: Int): Boolean =
-            codePoint in LATIN_UPPERCASE_START..LATIN_UPPERCASE_END ||
+            codePoint in DIGIT_START..DIGIT_END ||
+                codePoint in LATIN_UPPERCASE_START..LATIN_UPPERCASE_END ||
                 codePoint in LATIN_LOWERCASE_START..LATIN_LOWERCASE_END ||
                 Character.UnicodeScript.of(codePoint) == Character.UnicodeScript.HANGUL
     }
diff --git a/Prezel/feature/profile/impl/src/main/java/com/team/prezel/feature/profile/impl/ProfileScreen.kt b/Prezel/feature/profile/impl/src/main/java/com/team/prezel/feature/profile/impl/ProfileScreen.kt
index ab4e9c29..e0fc6b68 100644
--- a/Prezel/feature/profile/impl/src/main/java/com/team/prezel/feature/profile/impl/ProfileScreen.kt
+++ b/Prezel/feature/profile/impl/src/main/java/com/team/prezel/feature/profile/impl/ProfileScreen.kt
@@ -120,7 +120,7 @@ private fun ProfileScreen(
         )
 
         PrezelButtonArea(
-            showBackground = true,
+            showBackground = false,
             modifier = Modifier.advancedImePadding(),
             mainButton = { modifier ->
                 PrezelButton(
diff --git a/Prezel/feature/profile/impl/src/main/java/com/team/prezel/feature/profile/impl/component/NicknameTextField.kt b/Prezel/feature/profile/impl/src/main/java/com/team/prezel/feature/profile/impl/component/NicknameTextField.kt
index 2cc650f0..f3f2f583 100644
--- a/Prezel/feature/profile/impl/src/main/java/com/team/prezel/feature/profile/impl/component/NicknameTextField.kt
+++ b/Prezel/feature/profile/impl/src/main/java/com/team/prezel/feature/profile/impl/component/NicknameTextField.kt
@@ -13,6 +13,7 @@ import com.team.prezel.core.designsystem.component.textfield.PrezelTextField
 import com.team.prezel.core.designsystem.component.textfield.PrezelTextFieldStatus
 import com.team.prezel.core.designsystem.preview.BasicPreview
 import com.team.prezel.core.designsystem.theme.PrezelTheme
+import com.team.prezel.core.model.profile.Nickname
 import com.team.prezel.feature.profile.impl.R
 import com.team.prezel.feature.profile.impl.model.NicknameValidationState
 
@@ -29,6 +30,7 @@ internal fun NicknameTextField(
         label = stringResource(R.string.feature_profile_impl_nickname_text_field_label),
         placeholder = stringResource(R.string.feature_profile_impl_nickname_text_field_placeholder),
         status = nicknameValidationState.toNicknameStatus(),
+        maxLength = Nickname.MAX_LENGTH,
         keyboardOptions = KeyboardOptions(
             keyboardType = KeyboardType.Text,
         ),