They are installed in ubiquity during installation of Loki.
I've checked that right after clean install
here is the result.

and I think that ibus dependancies are mean.

1) ibus

bagjunggyu@loki:~$ sudo apt remove ibus -s
[sudo] password for bagjunggyu: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  gir1.2-javascriptcoregtk-4.0 gir1.2-json-1.0 gir1.2-soup-2.4 gir1.2-webkit2-4.0 libatkmm-1.6-1v5 libcairomm-1.0-1v5 libglibmm-2.4-1v5 libido3-0.1-0 libpangomm-1.4-1v5 libsigc++-2.0-0v5 sbsigntool
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
  ibus ibus-hangul ibus-table switchboard-plug-gcc-bluetooth switchboard-plug-gcc-color switchboard-plug-gcc-sound switchboard-plug-gcc-wacom unity-control-center
0 upgraded, 0 newly installed, 8 to remove and 0 not upgraded.
Remv ibus-hangul [1.5.0-1]
Remv ibus-table [1.9.1-3ubuntu2]
Remv ibus [1.5.11-1ubuntu2] [unity-control-center:amd64 ]
Remv switchboard-plug-gcc-bluetooth [0.2.0-0~72~ubuntu0.4.1] [unity-control-center:amd64 ]
Remv switchboard-plug-gcc-color [0.2.0-0~72~ubuntu0.4.1] [unity-control-center:amd64 ]
Remv switchboard-plug-gcc-sound [0.2.0-0~72~ubuntu0.4.1] [unity-control-center:amd64 ]
Remv switchboard-plug-gcc-wacom [0.2.0-0~72~ubuntu0.4.1] [unity-control-center:amd64 ]
Remv unity-control-center [15.04.0+16.04.20160413-0ubuntu3+elementary7~ubuntu0.4.1]


###ibus-hangul : Input Method for Korean

bagjunggyu@loki:~$ sudo apt remove ibus-hangul -s
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  gir1.2-javascriptcoregtk-4.0 gir1.2-json-1.0 gir1.2-soup-2.4 gir1.2-webkit2-4.0 libatkmm-1.6-1v5 libcairomm-1.0-1v5 libglibmm-2.4-1v5 libido3-0.1-0 libpangomm-1.4-1v5 libsigc++-2.0-0v5 sbsigntool
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
  ibus-hangul
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
Remv ibus-hangul [1.5.0-1]


###ibus-mozc : Input Method for Japanese

bagjunggyu@loki:~$ sudo apt remove ibus-mozc -s
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'ibus-mozc' is not installed, so not removed
The following packages were automatically installed and are no longer required:
  gir1.2-javascriptcoregtk-4.0 gir1.2-json-1.0 gir1.2-soup-2.4 gir1.2-webkit2-4.0 libatkmm-1.6-1v5 libcairomm-1.0-1v5 libglibmm-2.4-1v5 libido3-0.1-0 libpangomm-1.4-1v5 libsigc++-2.0-0v5 sbsigntool
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.


###ibus-pinyin : Input Method for Chinese

bagjunggyu@loki:~$ sudo apt remove ibus-pinyin -s
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'ibus-pinyin' is not installed, so not removed
The following packages were automatically installed and are no longer required:
  gir1.2-javascriptcoregtk-4.0 gir1.2-json-1.0 gir1.2-soup-2.4 gir1.2-webkit2-4.0 libatkmm-1.6-1v5 libcairomm-1.0-1v5 libglibmm-2.4-1v5 libido3-0.1-0 libpangomm-1.4-1v5 libsigc++-2.0-0v5 sbsigntool
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.