Here are my personal adjustments to Kitty. You may find it useful.
As of version 0.63.0.2 there is now a specific portable version. Not sure how it is different than just adding the kitty.ini file.
Here are the contents of my Kitty Configuration File. Copy the contents into notepad and save it to the directory where Kitty is running as the file "kitty.ini".
Changes to Default Settings
These changes are in order of importance to my everyday use.
Lines of scrollback: 20000
Reset scrollback on keypress: Checked
Reset scrollback on display activity: Unchecked
Category: Window > Translation
Remote character set: UTF-8
Category: Window > Colours
ANSI Blue: Red:74 Green:74 Blue:255
ANSI Blue Bold: Red:140: Green:140 Blue:255
Seconds between keepalives (0 to turn off): 25
Category: Terminal > Bell
Action to happen when a bell occurs: Visual bell (flash window)
Taskbar/caption indication: Flashing
http://dag.wieers.com/blog/improving-putty-settings-on-windows#skip-to-summary - very similar preferences.