Feels like a font issue. Do you have e.g. nerdfont installed and in use in your terminal? You could check the config for plugins that makes that style, and check which fonts are in use. Could also be powerline fonts that are needed: https://github.com/powerline/fonts
I remember once upon a time there was a store in Hakaniemi, but it seems that’s closed. Radioduo in Herttoniemi sells electronics. Then there’s always Partco.